Whelson shall not be liable for demurrage or storage charges of any nature howsoever arising levied by third parties, and where paid by Whelson, shall be refunded to Whelson by the customer on demand. The customer hereby appoints Whelson irrevocably and in rem suam as its agents in its place and stead to contract for the storage of such goods upon such terms and conditions as Whelson may, in its sole discretion, elect, and without any liability whatsoever attaching to Whelson to attend to such storage.