“That the Defenders had a sufficient legal interest, and in their own right as tenants, to enter into arrangements with the Railway Company cannot be denied; and having entered into a contract to their mutual satisfaction and benefit, it does not seem apparent how a third party, whose interests are unprovided for, can claim any part or share in it. The Pursuer said there might be jus quæsitum tertio jus quæsitum tertio , but no decision was cited to bring the present case under that title; and it is thought it will be found, that in all the cases where rights were held to be so acquired, the parties were named and their interests expressly provided for.”