William Penn's First Walking Purchase. This site, Towissinck or Jerricho Creek, was the northern boundary of Penn's 1st purchase of Native American land on July 15, 1682. The land purchase was measured by the distance a man could walk in a day and a half, starting from the mouth of the Neshaminy Creek. It is believed Penn walked the distance himself, covering what is now Bristol, Falls, Middletown, Newtown, Lower and part of Upper Makefield Twps.