I have checked the requested reference and do not see a family history for the Long surname.
There are two mentions:
Albert, graduated from Edmund Pendleton H.S 1923.
From Colonial Land grants in Caroline Co Va.
Richard purchased 1165 acres on August 20, 1734. This purchase is recorded in Book 15, page 286
Richard Long purchase 340 Acres and 70 poles, near Solomons Garden, in St. Margarets parish on June 13,1729.
Wish I had more for you