¶1Witherspoon, being an acting constable of the city of Detroit, received for collection an execution1 on a judgment standing on the docket of Justice Barbier against William C. J. Campau at the suit of Edwin H. Stevens. This suit was dated December 4, 1876, and on the eighth day of that month he levied by virtue of it on a paper boat, which he took to and left at the Excelsior Boat Club in charge of one Plass. On the next day Willemin went to Witherspoon with what purported to be a copy of a mortgage from Campau to John H. Clegg of the boat, together with a buggy and cutter, given to secure a debt of three hundred dollars, dated November 24, 1876, and due three days thereafter. On this mortgage Willemin, as agent for Clegg, demanded possession of the boat, of Witherspoon, and on the latter refusing to deliver it up, went to the boat-house and took possession of it. Thereupon Witherspoon brought this suit in trover, and recovered judgment for the amount of the execution. Defendants sued out a writ of certiorari and alleged as errors that the judgment was rendered without any proof of conversion by the defendants, and without any proof of the plaintiff’s interest in the property. -There was a further assignment that the judg*486ment by Justice Barbier was not sufficiently proved, but this was manifestly without merit. The circuit court reversed the justice’s judgment, and the case is now before us on writ of error.
¶2The proof of plaintiff’s interest was made by producing. the judgment rendered by Justice Barbier, and the execution issued upon it. The proof of conversion was also ample. The officer left the property in the boat house with a custodian, and Willemin, acting for Gregg, removed it claiming superior right. Nothing more could be essential to make out a right of action.
¶3It is now claimed that the judgment of the circuit court should be sustained because Witherspoon had no right, as against Clegg’s mortgage,'to make a levy on a part of the property covered by it (Worthington v. Hanna, 23 Mich., 534; Harvey v. McAdams, 32 Mich., 477), and if he had, it does not appear that the mortgaged property was sufficient to pay both the mortgage and the execution, and consequently the judgment in favor of Wither-spoon for the full amount of the execution was unwarranted. It is sufficient to say on these points that it does not appear from the record that the justice had his attention called to them, nor was any error assigned upon them in the affidavit for a certiorari. The circuit court could not take notice of errors which were not assigned, nor presume errors which were not affirmatively shown by the return. Fowler v. Detroit & Milwaukee Ry. Co., 7 Mich., 79.
¶4The judgment of the circuit court must be reversed and that of the justice affirmed, with costs of this.and of the circuit court.