Hosking, Roger: Paquetbot cancellations of the world (2nd edition 1987), 307 pages, softcover; PLUS: Drechsel, Edwin: The Paquetbot Marks of Africa, the Mediterranean Countries and their Islands (1980), 72 pages, softcover; PLUS: Studd, A.: ‘Paquetbot’ and ‘Ship Letter’ Cancellations of the World 1894–1951 (1953), 84 + 1 pages, hardcover; PLUS: Cockrill, Philip: Ocean Mails. Being an account of Sea and Ship Cancellations of the 20th Century, 34 pages, softcover (the cover has small faults); PLUS: Rainey, Thomas: Ocean Steam Navigation and the Ocean Post (1858; REPRINT 1977), 224 pages, softcover. Most of the titles in very good condition. Estimate: 80 Euro