Hong Kong. (Forces On Western Front). 1917. Stamp-less envelope written from Lumbres, France endorsed 'On Active Service'addressed to Hankow, China cancelled by 'Army Post Office/S. 19' double ring '24/10' with boxed 'Crown/Passed by Censor/No 2454' in red with Imperial Post Shanghai on reverse and forwarded to Hankow '20/12'. Very nice item of destination mail from the Western Front.