CHAILEY QUARRY. 
207 
rivulet, and may be observed in the bank of the 
adjoining hop-grounds. Tins lignite has much the 
appearance of jet: it is of a velvet black; does 
not soil the fingers ; has a resinous lustre, and con- 
choidal fracture ; is very brittle, and burns with a 
bright flame. 
TILGATE FOREST. 
In attempting to trace the Tilgatc grit from 
Hastings to the west of Sussex, with the exception 
of Ore, ])reviously mentioned, the first (piarry that 
has been oj)cncd is on Chailey North Common, 
about seven miles north of Lewes.* A rivulet, 
which runs along the valley on the north of Chai- 
ley, marks the termination of the Weald clay, and 
the emergence of the Horsted sands with lignite ; 
the latter beds continue on to the valley, beyond 
the little public house ou the road side, near the 
eighth milestone, where the Tilgate beds basset 
out, and form a bold ridge or hill. The strata in 
this place are disposed in the following order : — 
1. Ferruginous and fawn-coloured sands, and 
sandstone. 
2. Tilgate stone^ from tAvo to four feet thick. 
* That it approaches the surface, in many places, between Ore and 
Chailey, cannot however be doubted, but its course is hid by the deep 
bed of diluvial clay and loam that constitutes the subsoil of this district ; 
the sinking of a well, or some other artificial opening, will one day or 
other detect it : and as it is decidedly one of the best road materials in 
the county, a knowledge of its probable range and extent is of great 
importance in many parts of Sussex. 
