delivered the opinion of the court.
The action was brought below to recover damages-from the defendant (plaintiff in error here) upon the ground that it had negligently, on September 12, 1888, caused an injury, which resulted in' the death of Pool, the plaintiff’s intestate. The cause was tried by á jury. At the close of the evidence for the plaintiff, defendant'moved for a nonsuit on the grounds (1) that no negligence had been shown on its part; (2) that the evidence established contributory negligence on the part *439of the deceased. These motions were overruled, and exceptions reserved. The defendant thereupon rested. Exceptions were also taken to the action of the court as to the following: (a) an instruction of the court that if the jury found that Pool, the deceased, was a.car repairer and in a different line of service from that of the negligent servant (if any such there was), and Pool’s death was caused thereby, then defendant was liable; (5) to an instruction that the trainmen or yardmen' of the. defendant company were not fellow-servants of the deceased, who was a car repairer; (e) to the action of the court in submitting to the jury for their determination as a fact, whether Pool, the deceased, was a fellow-servant with the switchman Kilpatrick, by whose negligence it was claimed the injury resulted; and (d) to an instruction that, in ascertaining the quantum of damages, the jury should consider the number of the family left by the deceased, and the ages of his children.
Before the case went to the jury the defendant renewed its request for a peremptory instruction in its favor, which, being refused, exception was taken. The court in its general charge to the jury, gave as the law of the case what is usually denominated the “ departmental theory” of the law of fellow-servant, that is to say, it substantially instructed that the criterion by which they were to determine whether the relation of fellow-servant existed, was by ascertaining whether the servants were employed in the same department of service, and if not so employed, they were not fellow-servants. Two questions were submitted by the court to the jury to be answered by them. They were: First, “What of the employes of the defendant, if any, were negligent in the discharge of their duty, and by which the deceased was injured?” Second, “ Did the deceased use such care and precaution to avoid the injury as a prudent man, in the exercise of due diligence, should have used?” The jury returned a verdict in favor of the plaintiff, answering the first question, “Kilpatrick,” and the second, “ Yes.” After a denial of a motion for new trial, an appeal was taken to the Supreme Court of the Territory, in which court the judgment was affirmed. The grounds *440upon which, this affirmance was based were that there had been no negligence on the part of the deceased, and that the switchman Kilpatrick was not a fellow-servant with the car repairer, because they were employed in different departments of service, One of the-judges dissented on the ground that the deceased had been guilty of contributory negligence. 7 Utah, 303. The case was then brought by error here.
The questions which the record presents are: First, was the accident which caused the death of Pool the result of his own negligence, hence giving rise to no cause of action on behalf of his representatives ? Second, and if the accident was occasioned by the negligence of Kilpatrick, the switchman, can the representatives of the deceased recover damages resulting from such fact ? or to put the proposition in another form, Were Pool and Kilpatrick fellow-servants ? We will primarily consider the first of the foregoing enquiries, because it is manifest if the injury was brought about by the negligence of Pool, the question of fellow-servant becomes wholly immaterial.
Was the accident caused l>y the negligence of Pool ?
To answer this question involves an analysis of the evidence, (which the record fully sets out,) not for the purpose of weighing the testimony, or of ascertaining the preponderating balance thereof, but in order to arrive at the undoubted proof, from which the legal consequence, negligence, results. There can be no doubt where evidence is conflicting that it is the province of the jury to determine, from.such evidence, the proof which constitutes negligence. There is also no doubt, where the facts are undisputed or clearly preponderant, that the question of negligence is one of law. Union Pacific Railway Company v. McDonald, 152 U. S. 262, 283. The rule is thus announced in that case: “Upon the question of negligence . . . the court may withdraw a case from the jury altogether, and direct a verdict for the plaintiff or the defendant, as the one or the other may be proper, where the evidence is undisputed, or is of such conclusive character that the court, in the exercise of a sound judicial discretion, would be compelled to set aside a verdict returned in opposition to it. Del*441aware, Lackawanna &c. Railroad v. Converse, 139 U. S. 469, 472, and authorities there cited; Elliott v. Chicago, Milwaukee & St. Paul Railway, 150 U. S. 245; Anderson County Commissioners v. Beal, 113 U. S. 227, 241.”
The undisputed facts which the record here shows are as follows: Pool, the deceased, at the time he received the injury, was in the employ of the company as a car repairer, and had been so employed in its shops at Ogden City, Utah, for three or more years prior to his death. His duty was not only to do repair work on cars which were brought into the shop for that purpose, but also on cars outside of the shops and standing on the railway track. On the day the accident occurred, about half an hour before the usual hour for quitting their work, Pool and another car repairer, named Fowers, were ordered by the foreman of the car shops to repair the last car of a train of eighteen or twenty cars due to leave in a short time for the "West. The train was standing on one of the six or seven tracks composing a railway yard, and on these various tracks there was a frequent moving to and fro of trains and a constant switching of cars backward and forward.
The work to be done consisted in attaching what was called a carrying strap (made of iron and used to hold up what was known as a Miller hook) underneath the platform, about level with the main front of the car, in advance of and outside the wheels. In addition to this work, which Pool and Fowers were sent to do, Rice, who was also a car repairer working in the shop but doing a higher grade of work, was sent from the shop to “ adjust the air on the train.” These three emplovés found that in order to do the work of repairing the strap required the moving of the car a short distance from the others in the train, and this was accordingly done by the three, Pool, Fowers, and Rice. The work “ on the air,” which Rice was to do, could not be executed until the repairs to be made by Pool and Fowers had been completed and the car had- been recoupled to the train. The end of the car which required repair faced north towards the train from which it had just been detached, and Pool and Fowers went under the car in order to do the work assigned them, Pool on the west and *442Fowers on the e&st side of the track. Rice waited in the neighborhood of the car on the east side thereof, so that when they had finished their work the car might be recoupled, thus enabling him to do the duty assigned him of “ adjusting the air.” The two men in going under the car placed no flag or other signal to warn of their presence there, and thereby protect themselves from the peril to which they were necessarily subjected. Their reason for not taking this precaution is stated in the testimony of Fowers:
“ Q. Mr. Fowers, couldn’t you and Mr. Pool have put up a red flag out there that would have notified — put up a red flag or some other flag that would have notified the engineer of danger?
“A. Yes, sir.
“ Q. Why didn’t you put up a flag ?
“ A. Because it was too big a work.
“ Q. Because it was too much work ?
“A. Yes, sir.
“ Q. You thought it would take only a few minutes before you got through ?
“A. Yes, sir. We also knew that we had a man stationed there to watch for us, and considered ourselves safe.
“ Q. Who was the man you had stationed there to watch for you ?
“ A. Mr. Rice — Mr. George Rice.
“ Q. And you considered you were all right with Mr. Rice to watch for you ?
“A. Yes, sir.
“ Q. Who was Mr. Rice ?
“ A. He was a car laborer from the shop.
“ Q. Was he one of your car repairers ?
“ A. Yes, sir.”
Shortly after the- men went under the car a switch engine with a caboose and car moved from a track called the “ caboose track ” towards a switch connecting with the track on which the car was being repaired, and backed down for the purpose of coupling the caboose to the south end of this car, such end being the opposite one to that which was being repaired.,
*443The two men under the car could not be seen by the engineer or by those on the backwardly moving caboose. As the engine and caboose came back slowly toward the car, both the men under it heard the noise caused by its movement. However, owing to a curve in the- track, Fowers, who was on the east side of the car, could not see the engine and caboose approaching, but, hearing them, spoke to Pool, and said, “ I believe they are coming in here.” Pool, who was on the west side, leaned back and saw the switch engine and caboose coming down upon them. As he did so, a switchman by the name of Taylor, who was on the west side, was visible to and in hailing distance of Pool. The movement of Pool is thus related by Fowers: “ From his position he could lean back this way and could see the cars, see the engine and caboose coming from the south to couple on. He says, ‘ Yes, they are coming in here.’ ” Thereupon Pool made a movement to get from under the car, but did not entirely do so. Fowers jumped out on the east side. As he did so he spoke to Eice, who was standing near at hand, and told him to stop the switch engine from backing, and to say that men were under the car repairing, and not to strike or couple to it, as it could not go out until repairs were finished. .Eice walked to the south end of the car, and as the caboose slowly backed down, called out, when it was about twenty or thirty feet away, to Kilpatrick, a switchman, who was standing on the west side of the caboose, not to make the coupling as men were at work under the car. The caboose continued to slowly back towards the car, and when it arrived within about six feet stopped for a brief moment. Kilpatrick, on its so stopping, at once gave the signal to the engineer to back down, which signal was obeyed, the caboose striking the car with considerable force. In the meanwhile, either on the going forward of Eice or - on the stoppage of the caboose, Fowers returned quickly to his work, as did also Pool. As the former stepped under the car, being uneasy lest the caboose should couple, he looked out and caught sight of a portion of Kilpatrick’s body, and saw his arm wave the signal to back down. He cried out to Pool and threw himself from under the car, and was thus saved. Pool was not so alert, and *444was caught between the car on which he was working and the one in front thereof, receiving a mortal injury. Whilst it is certain that Eice gave a warning call to Kilpatrick, and told him that the men were under the car and not to couple the caboose to it, there is no evidence whatever that Kilpatrick heard and understood the purport of what Eice said to him when he called to him; there is no proof that he conveyed any signal to Eice which could have produced upon Eice’s mind, or upon the mind of any one, the impression that he understood that the men were under the car. There is no proof that Kilpatrick, after the warning given by Eice, transmitted any signal to the engineer to stop the train, and, therefore, there is no proof that the stop which the caboose made in its backward movement was the result of any communication, by signal or otherwise, between Kilpatrick and the engineer; nor, indeed, is there any proof that the stop was the result of anything but the caution of the engineer in backing down, under the impression that he had backed far enough to make the coupling which it was his purpose to make.
These being the undisputed facts, there can be no doubt that the fatal injury which Pool received was the result of his own inexcusable negligence. He went under the car which was standing on the track with a train in front of it, and with'' a certainty that a caboose was to be attached to the rear, without putting out a flag or other signal warning of his being under the car in order to protect himself from the peril which was obvious and of which he must have been' aware, having been for a period of three years engaged in- doing work of a like nature. This original act of negligence was continued by his subsequent conduct. As the caboose backed slowly down it was both heard and seen by him in ample time to have enabled him to get from under the car. There was also abundant opportunity for him to step out and give warning to the engineer in charge of the switch engine, and to Taylor the switchman, who was on the west side of the moving car, thus insuring absolute safety. He did neither. Nor can these acts of negligence be legally excused by conceding that'Pool’s conduct, whether of commission or of omission, was caused by *445the reliance placed by him on the warning which he expected would be given by Eice, the car repairer, who remained on the side of the track. Either Eice was the agent of Pool or of the corporation. If he was the agent of the former, of course Pool cannot recover for an injury suffered by him in consequence of the negligence of his own agent. If Eice, in giving the warning, was the servant of the corporation, his negligence gave rise to no cause of action on behalf of Pool, since in any and every view of the law of fellow-servant, Eice and Pool were such servants. The negligence of Pool, established by the undisputed testimony, was not denied by the court below, but was treated as immaterial, in consequence of what the court considered to be proof of neglect on the part of Kilpatrick, the switchman. Such neglect on his part was treated as having been the proximate and, therefore, sole legal cause of the accident. This conclusion is thus stated in the opinion of the Supreme Court of the Territory:
“ Nor can there be any question made but that Kilpatrick heard the signal from Eice to stop the engine, and that he acted upon such signal and did stop the engine about six feet from the car in question, under which the deceased was working at the time. The signal was understood by the switchman Kilpatrick, and obeyed by him. The verbal communication to Kilpatrick to stop the engine was a notice and warning as certain, positive, and safe as if there had been a red flag signal used in such case. In any event, Kilpatrick received it, understood it, and replied to it, and complied with it at the time, and he would have done no more had there been a red flag signal placed by the car.”
We have already said that the record,, which contains all the testimony, discloses no proof whatever either that Kilpatrick understood the call of Eice, that he gave any indication to Eice of his so understanding, or that, in consequence of Eice’s warning, he signalled the stoppage of the engine, or that ’ he did any of the things which the court below concluded the undisputed proof established that he did do. The case then, on this question, resolves itself to this, that we find no proof whatever of facts which the court below considered *446to be undisputedly established. The only testimony which refers to what took place at the time the warning was given by Eice is that of Eice and Fowers, Kilpatrick not having been examined. • The following excerpts from the testimony of Eice contain every word said by him which can in any way throw light on the subject:
• “Q. What, if any, conversation did you have with Mr. Kilpatrick ?
“ A. I had no conversation with Mr. Taylor, if that is his name; I do not know him. There were two switchmen; I didn’t know the- names. I had no conversation with Mr. Taylor. I’ had no conversation any further than to tell Mr. Kilpatrick not to come up to 'touch the cars, there were men working under the car.
“ Q. How far was he from you at that time?
“ A. Well, it was twenty or thirty feet at the time I told him this.
“ Q. Where was he at that time ?
“ A. He was on the west of the caboose.
“Q. Now, then, you told him that; what did you see, if , anything, him do ?
“A. Well, I saw him do nothing more until the engine and caboose'stopped within six feet of this freight car that they were working on, when it stopped still; the next signal was Mr. Kilpatrick gave a motion.
“ Q. What was that ?
“A. For it to come back, and it came back with great force; and at that time I heard Mr. Fowers holler ‘ Pull up ! ’ I run back to where Mr. Fowers was. He was at the other end of the car where he was at work previous to my going up and notifying him not to come down, and I saw Mr. Pool in between the cars, and we yelled for help. . . .
“Q. How long after you told Mr. Kilpatrick that there were men under the cars was it that you saw Mr. Kilpatrick go and make the signal ?
“ A.' How ?
“Q. How long after you told Mr. Kilpatrick that there were men under the car ?
*447“ A. How long after that ? oh, it was very short.
“ Q, And then what, if anything, did the engineer, on the car, on the engine that he was working, do in response to that signal; what did the engineer do with his engine in response to that ?
“ A. Why, he backed up.
“ Q. How did he back up ?
“ A. He came back with great force to this car.”
This testimony, it is apparent, does not even tend to show that the switchman'Kilpatrick understood the warning given by Rice, or that he acted upon it by transmitting a signal to the engineer to stop the train, and then signalled to continue. The mere presence of Bice, if owing to the noise of the moving train or from other reasons his warning either did not reach or was misunderstood by Kilpatrick, was not sufficient to convey the fact that men were working under the car, and therefore it should not-be coupled. Rige was an air adjuster.. His work could hot be done without the coupling of the car. His mere presence, therefore, if his voice was not heard and his words understood, would have naturally suggested that he desired the coupling to be done in order that his work might be accomplished. Nor can it be considered, without any evidence tending to that end, that Kilpatrick understood the warning, knew the men were under the car, signalled to stop the backward movement of the caboose, and then suddenly, without any change in the situation, give the signal to back up. Suoh conduct on his part would have been murder, and is certainly hot to be presumed without proof, on bare suspicion. The testimony of Fowers, full excerpts therefrom being in the margin, whilst more contradictory than that of Rice, likewise fails to show that Kilpatrick actually understood Rice or acted on the warning by him given.1
*448An examination of this testimony at once demonstrates that the only matter therein which seemingly tends to show that Kilpatrick understood Rice is the statement of Fowers, that he heard Kilpatrick make some reply, although the witness could not give the nature of the reply. But the question is, not whether Kilpatrick heard the voice of Rice, but whether he understood his meaning; therefore the mere fact that the witness testifies some reply was made, without giving the reply, *449in no way shows that Nice’s warning was comprehended. Indeed, the entire context of the testimony shows that Powers himself was uncertain whether the warning given by Nice was received and understood by Kilpatrick, for when asked in the first instance, whether Kilpatrick in giving the signal to hack did so after he had been warned by Nice, answered, “Well, I suppose,” a mere conjecture; and again, when asked if the engineer had stopped the engine in consequence of a signal *450from Kilpatrick, Ms reply was, “Yes, sir; it must have been,” a mere opinion. On cross-examination, in answering a question asking, “Who then signalled the engineer not to back back?” Fowers answered, “Yes, sir.” But the whole context of his testimony shows that the word “ not ” in the question was misunderstood by the witness, for he :was testifying solely as to the signal given to back after he (the witness) was under the car. Indeed, this is the only sigpal which Fowers testifies he saw given by Kilpatrick. To construe this question and answer as relating to a presumed signal not to back given by Kilpatrick to the engineer in consequence of Bice’s warning, would contradict the whole of Fowers’ testimony, since it clearly shows that no such signal was seen by him, and that the only signal which he noticed was the one given to make the coupling which led to the death of Pool.
*451Finding no proof, whatever, that the switchman actually understood the warning given by Nice and. acted upon it, there is nothing in the record to support the conclusion below that, as the warning was actually given and understood, Pool.was thereby relieved from the legal consequence of his negligence in having gone under the car without placing the usual and customary signal, of having remained there in the presence of an impending danger, and, when there was ample opportunity to avoid it, of having failed himself to give a warning as' the car moved down, which the proof shows he could have done, thus rendering his position absolutely safe.
The judgment is reversed, and the case remanded with directions to grant a new trial.