cover 1865 (13 Apr.) blue XU5 "Via Marseilles" to Dublin, marked "Naval Officers Letter 'Severn'" and bearing 1862 8c. and 12c. cancelled "B62" in blue, Hong Kong and "H&K PACT" c.d.s. on reverse. Since this was posted at a local office and not on board ship it was not entitled to the privilege rate of 12c. (Dec. 1864 - Jan 1870) and was treated at the normal civilian rate of 32c. A rare and unusual franking. Photo