The Amherst Township boundary ran S45E from the Nappan River almost 7 miles. The eastern boundary of the Gmelin grant ran S45E from the Nappan River along the Amherst Township line for 93 chains but then dropped straight south.
This split in direction created a triangular piece of property that was granted to Samuel McCully, Thomas Forrest, John Parkinson Pipes, and Robert Oldfield in 1816 (Book F, p. 81). This grant included an amazing drawing that clearly shows the Gmelin line, the Amherst line, and the 1816 grant boundaries. (See Family Search Nova Scotia Crown land grant registers, film #008453640 images 528-530).
A lot of 45 acres at the very tip of the McCully grant exchanged hands many times. When McCully sold the 45 acres to Alex Milligan in 1824 it was described as "a lot of land ...situated between Gamelial's [sic] eastern line and the westerly line of the Town of Amherst". Alex Milligan and wife Mary sold the property to John Coates in 1833. John Coates and wife Elizabeth mortgaged the lot to Robert Barry Dickey in 1834. In 1858, Thomas Bacon and his wife Matilda sold the 45-acre lot and other property to Thomas Shipley Jr. The lot was described as "the extreme point or gore of land between lands formerly owned by Governor DesBarres and the Township of Amherst. (Book DD, p. 17).
I've added a Samuel McCully Grant page on this website to more clearly document the boundaries. John Parkinson Pipes was my 3rd great grandfather so I'll definitely be looking more closely at his 250 acre portion of the grant.