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 situated 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."