Portsmouth, NH: Sir Isaac Pitman and Sons Ltd, 1968. Hardcover. 8vo (large). 8th Printing. Blue cloth, xix, 416pp.Bookplate on FFeP. Frontispiece of Ada Lovelace, with 15 plates, [including 1 folding]. Light bruise and fading on spine, else near fine in a near fine, clipped d/w that is somewhat soiled with..... More