This is a proceeding in mandamus. The petitioners-respondents, Ronald E. Callbeck, Edward E. Hurita and Fred W. Boynton, are civil service employees of the sheriff’s office in Multnomah county. All hold the rank of sergeant in the uniform division of that office and are eligible for promotion to the rank of lieutenant in that division.
The defendants-appellants, Raymond Kell, William Way and John Schum, at the time of the initiation of the appeal, together constituted the Civil Service Commission for Multnomah County. Terry Schrunk appears as a defendant by reason of the fact that before and at the time of appeal he was holding the office of Sheriff of Multnomah County.
On petition of Leonard Givens, who was the beneficiary of the Civil Service Commission’s action, an order was entered making him an intervenor, but he does not come here as an appellant.
Givens, who is the motivating subject of the dispute occasioning the instant proceeding, was once a sergeant in the uniform division under appointment of the then Sheriff Pratt and was promoted by him to a lieutenancy. After this he was demoted by Pratt’s successor, Sheriff Elliott. Givens resigned sometime after the demotion and left the state of Oregon for about two years, going to Bellingham, Washington, where he entered business. After a further lapse of three years, he was reinstated in the sheriff’s office as a lieutenant in the uniform division. This was done by reason of the action of the Civil Service Commission, and order of the Board of County Commissioners, creating a new, *642temporary position of lieutenant. Under the order of the County Commissioners, the temporary office of lieutenant created, began as of January 1, 1955, and ended April 30,1955.
That action prompted the petitioners to bring this proceeding in mandamus to require the Civil Service Commission to remove the name of Givens from the roll of the Civil Service employees and to require the sheriff to certify petitioners’ names to the commission in order that one of the three might be appointed to the offiee last given to Givens.
After a hearing in the circuit court, a peremptory writ was issued and Givens thereupon dropped from the rolls. It appears that the position which Givens last occupied, being a temporary position, had ended by reason of its time limitations, and, therefore, no names were certified to the commission by the sheriff as directed in the final writ. Prom the order directing the peremptory writ, the defendant commission and sheriff appeal.
The position of the petitioners-respondents is that the action of the Civil Service Commission and that of the sheriff, resulting in the temporary re-employment of Givens as a lieutenant, was contrary to the statutes of the state and regulations established thereunder. They also claim the commission was vested with no discretionary power to act as it did.
We are relieved, however, from passing on the merits by reason of our conclusion predicated upon petitioners’ motion to dismiss the appeal as moot.
As we have observed, the temporary position of lieutenant filled by Givens ended April 30, 1955, approximately three weeks after the issuance of the peremptory writ in this matter, rendering the office functus officio and, therefore, not one of further rm*643portan.ee to any of the parties having the prime interest therein. State ex rel v. Grand Jury, 37 Or 542, 62 P 208. Perry v. Oregon Liquor Control Commission, 180 Or 495, 177 P2d 406, is a ease wherein a liqnor license was suspended for sixty days, but by the time the appeal had reached this court the sixty-day period had expired. The court held that the matter was moot but proceeded to consider the merits on the ground of public welfare.
We were also informed by counsel for the parties at the time of oral argument that Grivens had, since the writ was issued, left the state of Oregon and has gone to Seattle, Washington, where he is now a captain in the sheriff’s office for King County. We also give weight to Grivens’ apparent disinterest in joining in the appeal of the defendants. These appeal to us as sufficiently persuasive reasons for holding that the matters raised by the appeal are moot and academic so far as the parties most interested are concerned. Oregon State Grange v. McKay, 193 Or 627, 238 P2d 778, 239 P2d 834, and cases there cited.
Aside from the matters above referred to, the record discloses a mandatory reason for our action. Prom it we learn that the defendant commissioners and defendant sheriff a few days after service upon them of the peremptory writ, respectively certified their compliance with the writ’s order. It is settled that where a peremptory writ of mandamus has been awarded, requiring the performance of an official duty, a compliance with the command necessarily prevents maintenance of an appeal because the reversal of the judgment would leave nothing upon which it could operate. Eilers Piano House v. Pick, 58 Or 54, 56, 113 P 54; Jacksonville School District v. Crowell, 33 Or 11, 13, 52 P 693; State ex rel v. Grand Jury, supra, at p 543; *644 Dimick v. Latourette, 72 Or 231, 233, 143 P 896; 3 Am Jur 314, Appeal and Error § 737.
We have, at the appellants’ suggestion, given consideration to the exception to the rule, which justifies a judicial determination of moot questions, when the question is one involving the public welfare and there is apparently some liklihood of it being raised again. Perry v. Oregon Liquor Control Commission, supra; Oregon State Grange v. McKay, supra, at p 631. But the circumstances here do not justify the conclusion that the matter embraces questions of wide public interest nor is it apparent that there is any liklihood that they will be raised again.
The appeal is dismissed.