Literature. International literature: Twelve books, booklets, etc. incl. Toeg: Dominica to 1935 Vol. I; Tyler: Philatelic forgers; Westley; Postal cancellations of London 1840–1890; Antonini, Grasset: Rivières du monde; Márfai: Postmarks of the Hungarian Post Offices and Postal Agencies; Lemberger: Helgoland Philatelie; Dromberg: Ångfartygspost i Östersjöområdet; Cockrill: Mail carrying steamship lines 1899; and some other. Many useful. (12).