The mishna lists various items that one needs to announce if he finds them. The gemara proceeds to explain some of the cases and in what way they need to be found, .i.e fruits in a basket but not next to the basket, money in a particular formation. Some contradictory sources are brought and explanations are given. The next mishna describes cases where an item without identifiable signs is left in a semi protected area and it is unclear if it was left there on purpose and the owner is planning to return for it or if it is left by accident. In that case, one is unable to pick it up as the owner will have no way to retrieve his item since it has no signs.