480 . 
Mr. Martin, of Pulborough, has also resumed his consideration 
of the structure of Western Sussex, and of the antielinal lines of 
the London and Hampshire Basins published in 1828 and 1899, 
with a paper on the relative connection of the eastern and western 
chalk denudations; in which he traces westward, from the Wealden 
district of Sussex, a system of six nearly parallel anticlinal lines, 
across the high table-land of chalk in Hants, Wilts, and Dorset; 
three of these lines of elevation proceed westward from the Wealden 
district, and three penetrate the chalk in an easterly direction from 
_the valleys of Wardour, Warminster, and Pewsey. The continuity 
of these lines is eccasionally interrupted for considerable intervals, 
and again resumed on the same parallel along’the great elevated 
plain of the chalk. 
Mr. Martin traces the most northerly and greatest of these anti- 
clinal lines from the vale of Peasmarsh, between Guildford and 
Godalming, along the entire base of the North Downs, eastwards 
to the sea at Folkstone, and westwards to Farnham, Alton, and 
Popham Beacon, where it terminates in the’ high flat dome or table- 
land of chalk. The most southerly anticlinal line extends from Green- 
hurst, near Steyning, eastward to Lewes, and along the base of the’ 
escarpment of the South Downs to East Bourne and Beachey Head ; 
and westwards by Midhurst and Petersfield to the Downs of East 
Hampshire, through which it emerges in valleys of elevation at East 
and West Meon, and in the valley between St. Giles’s and St. Cathe- 
rine’s Hill at Winchester. The central anticlinal line of the Wealden 
he traces westward from Hazlemere to Liphook, Selbourne, and Can- 
dover near Arlesford, and Beacon Hil! near Amesbury. 
The anticlinal elevation of the valleys of Wardour, Warminster, 
and Pewsey, after advancing some miles eastward into the chalk, 
terminate in the high table-lands of Salisbury Plain and the North 
Hampshire Downs, which form a great flat dome of elevation be- 
tween the counties of Sussex, East Somerset, and North Wiltshire. 
_ Mr. Martin considers many of the higher crests and ridges that run 
in an eastern and western direction above this elevated plain, to be 
due to saddle-shaped elevations on one’ or other of the great lines of 
fracture that attended the upward movement of the chalk. In the 
details of his paper he confirms and extends the observations of 
faults, twenty-five in number, between Ryegate Hill upon the North Downs 
and Clayton Hill on the South Downs, representing minor movements and 
longitudinal fractures parallel to the great escarpments that bound the area 
of the Weald; many of these faults have been recognised where he had 
. placed them by Mr. Hopkins. Mr. Farey also, in his “‘ View of the Agri- 
culture and Minerals of Derbyshire,”’ 1815, has given an account of great 
systems of faults and denudations in Derbyshire and five adjacent counties; 
together with the coloured figures before alluded to explanatory of the na- 
ture of faults and dislocations, or tilts of the strata, and the subsequent 
effects of denudation upon them ; which, though not confirmed in all their 
details by modern observations, show him to have been a most ingenious 
original observer, whose merits in this department have not been suffi- 
ciently appreciated. 
