cover GERMAN OCCUPATION: 1918 (23 Jan.) overprinted 10pf. card from Jelgawa to Riga and 1918 (27 July) envelope from Riga to Moscow and returned with overprinted 5pf. and 15 pf. showing censorship seal and h.s., both with light rust staining also 1919 (22 Feb.) "Feldpostkartenbrief" from Libau to Berlin from a member of the German Volunteer Army