Essex Well-Sections. 153
Dug 45 feet; the rest bored.
Good supply of water.
Blue [London] Clay, to sand and black pebbles, 100 feet.
Two wells at Romford are given as the same.
Onigwell.—Grange Hill
Dr. J. Mitchell's MSS., vol. iii., opp. p. 72.
Dug 228 feet; bored 170 feet.
Water abundant; rose to about 160 feet from the surface.
Through stiff clay, almost all blue, a foot or so at bottom
mottled.
Chingford Mill. For the East London Waterworks
Company. 1885 
Communicated by Mr. W. B. Bryan, the Company's
Engineer; and from Messrs. Docwra.
38 feet above Ordnance Datum.
Cylinder and shaft 50 feet; the rest bored (3 feet to 2 feet
diameter).
Water rose from the bore to 5 feet 1 inch above the surface.
Water-level, in July, 1885, 2 to 3 inches below the surface.