A 
’ 
By Professor T. Rupert Jones, F.RS., F.G.S8., §e. 147 
over the district, this time with Arctic ice in winter, if not nearly 
all the year through, till the sea-waters finished what the glacier, 
rain, and river had begun by furrowing the upraised land with creeks 
and valleys, and ultimately leaving hills and dales to be pleasantly 
clad with verdure, as we see them now in England. Of these changes 
few memorials in the Southern Counties are more persistent than the 
Sarsen Sronzs. 
VIII.—ApprEnprx. 
To complete a thorough view of the nature and history of the 
Sarsens, it is necessary to give the statements of the Geological 
Surveyors from researches made in 1858 and following years. Much 
of their work has been done in Wiltshire, and their views are largely 
based on what they have there made out. Mr. W. Whitaker’s 
additions to Professor Prestwich’s earlier researches have already been 
mentioned in a general manner. 
T.—WNotes from the Geological Survey Memoirs, Se. 
§ 1. 
Memoirs of the Geological Survey, &. Parts of Wiltshire and 
Gloucestershire, Sheet 34, 1858, p. 41—43. By A.C. Ramsay and 
others. ‘In many places the surface of the Chalk is strewn with 
blocks of hard siliceous grit, known as Druid Stones, Sarsen Stones, 
and Grey-wethers. On Marlborough Downs, and the country to the 
south near Marlborough and Fyfield, they are especially numerous, 
and the walls by the turnpike-road are built of, and the roads mended 
with them. Elsewhere on Marlborough Downs they are broken by 
the hammer into rectangular blocks for paving-stones. A few of 
the places where they are most numerous are marked “large stones” 
on the Ordnance Map; but these yield no idea of their surprising 
number, or of the extent of ground they cover, no indication being 
given of their occurrence over many large areas, where they strew 
the ground so thickly that across miles of country a person might 
almost leap from stone to stone without touching the ground on 
which they lie. Many of these flat masses of grey grit are four or 
L 2% 
