Middleton, R.E. (1893). ‘Water Contour Map to Accompany Report of the Hertfordshire Enquiry’. Royal Commission on Metropolitan Water Supply. Two colour lithograph
Middleton, R.E. (1893). ‘Water Contour Map to Accompany Report of the Hertfordshire Enquiry’. Royal Commission on Metropolitan Water Supply. Two colour lithographed map, 105 x 77.5 cm, at 1:63,360. Dissected, mounted on linen and folded to 27 x 26 cm, between marbled soft card covers with manuscript label. Cover worn and bumped. Map clean, age-toned, linen sound. In good condition. NOT GEOLOGICAL. Signed by Middleton.