Hong Kong Covers and Cancellations Marine Sorters — Type 2; 1873 (5 May) envelope to Hong Kong bearing Ceylon 1872-80 16c. pale violet pair cancelled by "C" obliterator with Galle despatch in red alongside, the reverse with further despatch c.d.s. and a fair strike of the Marine Sorter type d dated "MY 20/27 73"; some notation on the reverse. Photo