§ 250. Notice to creditors of incompetent person or conservatee. A court exercising jurisdiction over the property of an incompetent person or conservatee may, upon the petition of a committee of the property of such incompetent person or of the conservator of the property of such conservatee, authorize him to advertise for creditors and other persons interested in such estate, to present to him their claims with the vouchers thereof, duly verified, and naming a post-office address at which papers may be served on them by mail, as hereinafter provided, on or before a day to be specified in such advertisement, not less than thirty days from the last publication thereof, which advertisement or notice shall be published in two newspapers to be designated by the court as most likely to give notice to the persons to be served, not less than once a week for four successive weeks, and a copy of such notice securely inclosed in a post-paid wrapper, shall be deposited in the post-office in the village or city where such committee or conservator resides, addressed to each person interested in the estate of such incompetent person or conservatee who shall appear from the books or papers of such incompetent person or conservatee to be interested in said estate, or who shall be known to said committee or conservator to be so interested, at the proper post-office address of such interested person, so far as said committee or conservator shall be able to ascertain the same, at least thirty days prior to the time limited in such notice for presentation of such claims.