 In 1751, after the formation of Cumberland from Lancaster County, the Provincial Assembly passed a special act making Yellow Breeches Creek the official boundary between counties.At that time, the lands in this area were annexed to Newberry Township, where they remained until February 1803, when the York County Court approved petitions of area citizens to create the Township of Fairview.In the mid-18th century, the area known as New Market was owned by John Harris, founding father of Harrisburg and a trader with the large Shawnee Indian settlement at the mouth of Yellow Breeches Creek.