“The said Company hereby become bound to pay the sum of 11,500 l . to Mr. Philip, his heirs, executors, or assignees, at the first term of Martinmas or Whitsunday after the Company, on obtaining their Act of Parliament, shall have begun to execute any part of the said railway under the powers of the Act, and the price to bear legal interest thereafter” (that is, from the time they begin to make the railway) “until paid; and the Company, before taking possession of or entering on the premises, either paying or satisfying the said Robert Philip for the price thereof; and Mr. Philip to exhibit a clear title to the property.”