Bailee

contracts, is one to whom goods are bailed. His duties are to act in good faith; he is bound to use extraordinary diligence in those contracts or bailments, where he alone receives the benefit, as in loans; he must observe ordinary diligence in those bailments, which are beneficial to both parties, as hiring; and he will be responsible for gross negligence in those bailments which are only for the benefit of the bailor, as, deposit and mandate.

Story’s Bailm. § 17, 18, 19.

He is bound to return the property as soon as the purpose for which it was bailed shall have been accomplished. And he has generally a right to retain and use the thing bailed, according to the contract, until the object of the bailment shall have been accomplished.