GEOLOGICAL NOTES. 203
and Ward's Lane, but its thickness was constantly varying.
London-clay was visible for a horizontal distance of about 10
yards, at the bottom of the cutting, about So to 90 yards north
of Ward's Lane. The cutting from Cauliflower Lane to Hatch
Lane is 10 or 11 feet in depth.
Fig 1 Sketch-map of Railway between Ilford and Woodford.
Railways- - - Sta = Station. B.H. = Buckhurst Hill, a = Cauliflower
Lane. b == Ward's Lane, c _= Hatch Lane. C.Br, — Cran Brook.
d - - d = Extent of Cutting, t - - t = Tunnel. Scale, 1 inch to the mile.