In all cases where warrants have issued under the laws requiring settlements within the purchase of 1768, and previous purchases, and whereon surveys have been or hereafter shall be made and filed in the Surveyor General’s¹ office, it shall be the duty of the land officers to issue patents therefor, without further evidence of settlement and improvement than that upon which the warrant was granted, except other claims are set up for the same land, in which cases the board of property shall be competent to decide on, in the usual manner.