When any assignee becomes satisfied that it is no longer advantageous to the creditors of his assignor to keep the assignment open, he may apply to the district court for a discharge from his trust, upon a notice of his intention to make such application, stating the time thereof, which notice shall be published in the newspaper aforesaid, for at least four weeks next before such time, at which time he may file his petition in said court for such discharge; which petition, verified by his affidavit, shall set forth the disposition made of the assets of the assignment to him; what portion of them remains on hand, and their condition; the amount realized from the assets; the particular disposition of such amount; the demands allowed particularly, with their respective amounts, and owners’ names, and the sums paid on each, with an offer to deliver into the charge of the court what remains of the assets, and the evidence thereof, and accompanied by all vouchers therewith connected.