cover 1850 entire letter headed "Aden 9th March 1850" to Bannockburn, Scotland via Alexandria, Malta, Marseilles and London, from the Commanding Officer of the 78th Highlanders ordering a supply of regimental tartan and forage caps, rated "2/3" in manuscript and showing sloping "CR" (Caledonian Railway) h.s. on front. Reputedly the only recorded 2/3d letter from Aden. Photo