"If storage charges are due, a bailee, such as respondent can assert a warehouseman's lien . . . . He may retain the goods or sell them. If an action is brought against the bailee, he can assert his enforcement of its lien as a defense to his non-delivery."
"If a warehouseman sells the goods pursuant to a lien, he must return, on demand, any proceeds from the sale in excess of the value of his lien, to the person who would have been entitled to delivery of the goods, but for the lien."