Parchment, 24 x 20 inches, very good, usual folds, boldly signed by architects Robert and James Adam, the builder Thomas Nicholl, and additionally signed by the owners Beaumont Hotham, 2nd Baron Hotham, Thomas Thynne, 1st Marquess of Bath, and William Cavendish-Bentinck, 3rd Duke of Portland, who was twice Prime Minister.....