Isle of Man.(Prisoner of War Mail). 1916. Envelope printed 'Prisoner of War' written by 'M. Zeeber, Aliens Camp 1, Douglas' addressed to London bearing Great Britain SG 357, 1d scarlet tied by Douglas/ Isle of Man double ring '14th Nov 16' with adjacent bold 'Aliens Detention Camp/ Douglas, I.O.M./ Censored' in cerise on face, endorsed 'Business Letter' and London arrival on reverse '16 Nov'.