CHATFIELD, Henry. An Elementary Essay on the Principle of Masting Ships,, Devonport: 1834, 4°, FIRST EDITION, [2] + 34pp., 2 folding lithographed plates (plates spotted), contemporary cloth, Scott bookplate. [Scott 609] -- W. ORCHARD. An Improved Method of raising Sunken Ships as adopted in the instance of the barque "Roslin Castle" September, 1854, Plymouth: 1855, 4°, FIRST EDITION, 12pp. + 1p. List of Materials, 2 folding lithographed plates (the larger plate cleanly but badly torn, title heavily soiled), green half calf, Scott bookplate. [Scott 708] (2)