HUDSON, W.H. Birds of La Plata, London & Toronto: J.M. Dent & Sons, 1920, 2 vols., 4°, limited to 200 copies signed by the author, tipped-in coloured plates, original cloth -- MITCHELL, F.S. The Birds of Lancashire ... revised by Howard Saunders, London: Gurney & Jackson, 1892, 8°, second edition, folding map, plates, original cloth; and 3 others of related interest, including another title by Hudson. (6)