Within ninety (90) days after the date of his appointment, or, within additional time allowed by the court, a conservator shall file in the court a verified inventory of all of the property of the ward which has come into his possession or of which he has knowledge. When any property of the ward not listed in the inventory comes into the possession or to the knowledge of the conservator, he shall include the after discovered property in his next accounting.
W.S. 3-3-602