cover 1858 (6 Jan.) entire letter addressed to Cadiz "Overland viâ Suez & Gibraltar" pair of India 1856-64 8a. tied by Singapore "B/172" octagonal cancellations, rated "1/8" in black crayon and "2/-" in red crayon with Gibraltar transit (15.2) c.d.s. on face; reverse bears company oval, "SINGAPORE P.O." and Alexandria c.d.s. Horizontal filing crease and some faults