cover EXETER: 1837 (July) entire letter from Mauritius to London, rated "1/3" and inscribed "Catherine", the reverse showing fair (slightly incomplete) strike of the framed "INDIA LETTER/EXETER" (In.1) in red on reverse (just clipped by vertical fold), otherwise fine. Due to the shallow draft of the Exe all Ship Letter markings from this port are rare with very few examples of each type being recorded. Photo