138 History of the Sarsens. 
of the local sand-banks and beach-lines.” T, Rupert Jones, Proceed. 
Geologists’ Assoc., vol, vi., 1880, p. 441. 
These erosive processes have brought to view, from out of the 
once uniform surface of the block, more or less indications of the 
concretionary structure in many instances. Sometimes large 
mammillary er lumpy curves of the harder concreted portions, 
sometimes small kernel-like structures, are visible. The same cause 
has made manifest on the outside edges of some blocks a laminated 
structure, due to the successive deposition of limited supplies of 
slightly-varying sands in the Tertiary sea ; but almost lost to sight 
in a freshly-fractured surface of the stone in the apparent homo- 
geneity of the mass. Mr. W, Cunnington, F.G.S., has a collection 
of such varieties of Sarsen; and in the valuable and extensive 
collection of Sarsens, accumulated and set out to view, with all their 
features preserved, by Prof. H. Nevil Story Maskelyne, F.R.S., in 
his garden-grounds at Basset-Down House, these peculiarities can 
be readily and fully studied. 
A fine mammillated specimen at Mildenhall, Marlborough, has 
been noticed by the Rev. C. Soames. 
The well-known ‘‘ Blowing Stone,” at Kingston-Lisle, at the 
foot of Uffington Downs, is a large weather-worn reddish-brown 
Sarsen. By the wayside inn it stands on edge, about 3ft. high, 
34ft. broad (long), and 2ft. thick. It is traversed by several holes ; 
seven appear in front; three on the top; and there are others 
behind. At the north end there is also an irregular hollow. The 
opening through which it is 4/own is at the top and about jin. wide. 
The sound issues from one side near the top. See the Transact. 
Newbury District Field Club, vol. i., 1871, p. 148; and Murray’s 
“ Handbook for Berks,” &c., p. 40. 
The “ King’s Stone” or “Coronation Stone,” at Kingston-on- 
Thames, is a Sarsen, of a light brown colour, irregularly square, as 
mounted on (and partly in) its pedestal, and about 2ft. 10in. high, 
by about 2ft. square in section. It has a nearly flat, but somewhat 
1 The white Lower Greensand of Stone and Hartwell, near Aylesbury, contains 
numerous large, sub-globular, boldly mammillated concretions, known as “ Bowel- 
stones” in the neighbourhood. ‘These are analogous as to structure. 
