GRENADA POSTAGE DUE 1892 complete set, SG D1/D3, very fine mint (3 stamps)

GRENADA 1786 SLAVERY RELATED LETTER (March) a rare entire letter from Thomas Lithgow to George Dunlop in Ayr, Scotland,  relating to The Belmont Estate (sugar plantation), with references to coffee, cocoa etc, with circular GRENADA/Crown mark, fine “DOVER/SHIP-LRE” and Bishop mark. Lithgow is listed in David Dobson’s work, “Scots in the West Indies 1707-1857”