The Old Boundary Pine was located  east of this point. The "curved" segments roughly following the course of the Merrimack at a distance 3 miles north of it are not true curves, but rather a series of line segments approximating the curved course of the river. Another granite marker, also placed in 1890, stands on the beach between Salisbury, Massachusetts and Seabrook, New Hampshire at 80 feet from the high tide line, marking the end of the surveyed border, with the border taken to extend into the Atlantic Ocean to the "limit of State jurisdiction."
The Old Boundary Pine was located east of a point. The "curved" segments along the Merrimack River, approximately three miles north of this point, are not true curves but rather approximations of the river's actual path. Another marker, placed in 1890, marks the end of the surveyed border at 80 feet from the high tide line on the beach between Salisbury and Seabrook. This marker extends the border into the Atlantic Ocean to the boundary of state jurisdiction.