Whoever finds lost money or goods of the value of $3 or more shall, if the owner is unknown, within 7 days give notice thereof in writing to the clerk of the town where the money or goods are found and post a notification thereof in some public place in said town. If the value is $10 or more, the finder, in addition to the notice to the town clerk and the notification to be posted, shall, within one month after finding, publish a notice thereof in some newspaper published in the town, if any, otherwise in some newspaper published in the county.