No Edition Remarks. Unpaginated. No dust jacket. Red cloth with decorations. Volume IV, pagination continued on from previous volume. Black and white illustrated frontispiece with black and white plates and colour maps to front of book. Black and white illustrations throughout. Binding remains firm. Pages are lightly tanned throughout with light foxing to endpapers. Illustrations and plates are bright and clear, with some light tanning and foxing to edges. Pen marks to text block edges. Pencil inscription to front free endpaper with staining to endpapers and pastedowns. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Heavy crushing to spine ends causing fraying to cloth. Staining and wear marks overall.