R.U.S.I. MAPS. Vol. LXXXI (1-5). Large maps. 1-2. Chart of Narraganset Bay and Rhode Island; mid 18th cent. 1:24000 approx. Scale bars of 10000 yards (= 15 inches) and 6 miles (= 15.75 inches). R.U.S.I. no. A 30.91A,B. Each part 660 x 985mm.; formerly one sheet 1320 x 985mm. 3. 'Plan of th...