cover 1840 1d. pl. 1a, AI, margins nearly all round (just clipped at upper-left corner), on entire letter to Edinburgh dated 26 May 1840, tied by fine light (slightly incomplete) strike of the dull magenta Cross with straight-line "RENFREW" alongside in the same colour; the entire with slight faults and some light soiling around adhesive but otherwise fine and attractive. Rare. Photo