1800. Aspin, Jehoshaphat, active 18th century-19th century, Walker, John, 1786-1873, and Barfield, John, active 1790-1842. by J. Aspin ; J. Walker sculpt. Relief shown by shading and hachures. Latitudinal and longitudinal lines. Coordinates approximate and based on Gree... J. Barfield, No. 91, Wardour Street, printer to His Royal Highness the Prince Regent,.