Bailor's duty to disclose faults: non-disclosure creates liability for damage and heightened responsibility when goods are hired. Bailor must disclose to the bailee any faults in the goods known to the bailor that materially interfere with use or expose the bailee to extraordinary risks; failure to disclose makes the bailor liable for resulting damage. If the goods are bailed for hire, the bailor is responsible for such damage whether or not he knew of the faults, creating stricter liability for hired goods.