Note this cache is in Pa
The best way to get this cache is from Yeatmans Station road in Pa. There is small parking at 30* 45.385 75* 45.524 where a gated farm road goes off to the right. More parking is about .2 miles further down Yeatmans Station Road. You are looking for the ruins of the old Sentman homestead that is only 400 feet from the road. The cache is not inside the ruins. You need to be very careful since close to a rusting piece of farm machinery there is nicely preserved 8 foot deep well (dry now) that is an open hole. In Colonial times this land was part of Delaware
Start up the Boundary line trail. Shortly there is the tough decision to make when the trail swings left and the GPS arrow points down the bank, across the stream and toward a difficult bushwhack. Do you bushwhack or stay on the trail that keeps leading you further away trusting me that it crosses the stream on a nice bridge and then comes back to much closer to the cache. Temptation to leave the trail will be great, but stay on the trail until you see an indication its time to bushwhack. Or if you don’t mind some/lots of stickers, just bushwhack.
Only about 0.2 miles away is GCHBCC that will take you to one of the 1892 boundary stone markers.
HISTORY LESSON The basis of the Delaware-Pennsylvania 12-mile Circular Boundary originated in 1681 when King Charles II of England granted William Penn land for his new colony of Pennsylvania with the provision that it had to be north of a 12 mile circle centered on New Castle. That land belonged to the Kings brother, the Duke Of York who acquired it by right of conquest having defeated the Dutch in New Castle. Wanting more access to the Delaware River, Penn was able to get the Duke to turn over his 12 mile arc of land along with other lands south of there that the Duke controlled. This land became know as the lower three counties of Pennsylvania. Although controlled by Penn and administered by a common governor, it was not part of Pennsylvania.
In 1701, Taylor and Pierson surveyed the arc of 12 miles radius with the center in the city of New Castle. At the time it was just a boundary between two counties that were controlled by the Penn family. This later became the boundary between Delaware and Pennsylvania. Many of the original survey markers had disappeared by the late 1800s, and significant questions arose as to the actual location of the boundary between Delaware and Pennsylvania.
The 1849 resurvey of the northeast corner of Maryland, by Lt. Col. J. D. Graham, U. S. Corps of Topographical Engineers correctly located the 12-mile distance in the area of the junction of the three states. He also creating the area known as "The Wedge". Assigning land that was believed to be part of Delaware to Pennsylvania. Graham's work was not ratified by Delaware, since this would have given the Wedge to Pennsylvania. The change was accepted on paper (maps) but was ignored in fact by Delaware which continued to exercise jurisdiction over the area.
In 1892, W.C. Hodgkins, Office of the U. S. Coast and Geodetic Survey, was contracted to survey the Delaware-Pennsylvania boundary.. Hodgkins found that there were no authentic points west of the Kennett/Pensbury Township border intersection in Delaware. He created a new arc connecting the Kennett/Pensbury point and the true 12 mile point on the extension of the Mason Dixon Line. This created the Horn, a narrow strip of land between the true 12 mile circle and the 1701 survey. At the western most point, the difference was between 1,500 and 2,000 feet. The Horn was land that was traditionally part of Delaware that was transferred to Pennsylvania. So Delaware officially re-gained the land in the Wedge and Pennsylvania got the Horn. Delaware did not ratify the survey until March 1921 because many of the residents of the "horn" including Mr. Joseph Sentman did not want to become part of Pennsylvania.
Your quest will be to find the ruins of the Sentman homestead that was part of colonial Mill Creek Hundred but is now part of Pennsylvania.