William Wilson (ca. 1762 – October 1821) — known as The Pennsylvania Hermit — became a figure in the folklore of southeastern and south-central Pennsylvania in the late 18th and early 19th centuries. His sister Elizabeth had been condemned for the murder of her children, although many believed her to be innocent of those charges. A pardon for Elizabeth was granted by the state and entrusted to William, but he was unable to deliver it in time to stop the execution. Following his sister's death, William withdrew from society, wandering westward across southeastern Pennsylvania and ultimately living his last 19 years in a cave near Hummelstown.
In some sources, William and Elizabeth are referred to as Amos Wilson and Harriot Wilson. However, the historical record leaves no doubt that the Hermit and his sister were named William and Elizabeth. The origin of these "alternate" names has never been fully explained.
Many key elements of the Wilsons' saga are documented in the records of the Chester County Courts and the Commonwealth of Pennsylvania. However, the story quickly became a part of local folklore and was embellished by generations of storytellers. It is often possible to note which elements of the tale are a part of the historical record and which might be considered suspect. However, the story of the Pennsylvania Hermit might best be considered historical fiction, as the familiar tale incorporates elements of both history and fiction, not unlike the popular image of a Johnny Appleseed or Davy Crockett. The following is a synthesis of numerous sources from both genres and is best regarded as historical fiction.
Little background information has survived regarding the Wilson family. Some early accounts report that William and Elizabeth's father was a farmer named John Wilson. John's first wife, and the children's mother, was also named Elizabeth.
Sources are divided regarding the Wilsons' ages. Some indicate that William was born ca. 1764, and his sister two years later, while others suggest that Elizabeth was born ca. 1758 and that William was her younger brother by an unspecified period of time. There is no record of other siblings, and some accounts specify that William was his parents' only son and Elizabeth their only daughter. William was said to have been born in Lebanon, in present-day Lebanon County, although in every other instance he and his family are linked to Chester County.