A hotelkeeper by a special arrangement with a guest may receive for deposit in a safe or vault of the character mentioned in section 60-01-29 any property upon such terms as such keeper and guest may agree to in writing, but every hotelkeeper shall be liable for any loss of the articles enumerated in section 60-01-29 of a guest in the hotel after said articles have been accepted for deposit, if such loss is caused by theft or negligence of the hotelkeeper or any of the hotelkeeper’s servants.