(AP) — A senior archaeologist dusted some dirt off the tip of a spearhead pulled from a trench carved out of a field in Springettsbury Township on Friday morning during the effort to find remnants of a prison camp from the Revolutionary War. Steve Warfel, standing in the center of the archaeological dig site off Locust Grove Road, turned the artifact in his hands which were tanned from days of working in the sun. Since the excavation began last month, volunteers and archaeologists alike, have found a variety of articles associated with the late 1700s and objects from thousands of years prior — such as the spearhead — and those from much later. The process, which in its entirety is slated to take six weeks, began with shovelling and screening top soil which unearthed three dozen pieces of red earthenware pottery, Warfel said, noting the find could be from the late 18th or early 19th century. Warfel hopes to find evidence of the stockade — the fence surrounding the camp — by uncovering and researching variances and disturbances in the soil. The subsoil is distinctly lighter than the top layer, Warfel said, pointing to darker spots at the bottom of the foot-deep trench, all of which will be photographed and recorded. British prisoners from the Battle of Saratoga were all initially housed in a prison in Charlottesville, VA., but British success in battles nearby forced colonists to relocate them, for fear they would be freed. In 1979, in a site just beyond the trees surrounding Warfel's dig area, thousands of artifacts were uncovered — which can be found in the State Museum of Pennsylvania — but no evidence of the stockade.