LOCAL RESEARCHES AND DESCRIPTIONS. 237

round pebbles, which, crowning the bank at Green-wich Park, passes on to Blackheath and Sydenhamin one direction, and to Dartford , if not farther, inthe other, with surprisingly little variation of level.One prevalent height of this terrace is from 145 to150 feet. It is so at Woolwich as distinctly as atGreenwich, though Shooter’s Hill rises between tobreak the continuity. At one spot, however, onBlackheath, I found it fully 154 feet. Instances ofmarkings, which may be regarded as coincident, occurin the north of Scotland and in Lothian.

SUSSEX AND HAMPSHIRE.

251. Even after having so far found a uniformityof markings along the coasts of our island, it seemedto me very desirable that some investigations shouldbe made on the south coast. This was not onlynecessary to settle the question of an entire unifor-mity, but it promised to lend some light to thekindred question regarding a former connexion be-tween Britain and France .

252. The chalk mountains of Sussex and Hamp­ shire come, as is well known, in some places, nearto the sea; in others, they leave a considerablebreadth of low plain between them and the English Channel .

253. At Brighton, where they stoop down almost