26 PROCEEDINGS COTTESWOLD CLUB 1907 
The Ostrea- and Rhynchonella-Bed is here of considerable thick- 
ness, and similar to the equivalent deposit at Grove’s Quarry, Milton— 
a section the Members visited on the following day. 
Returning to Upper Slaughter, the Members investigated, under 
the guidance of Mr G. B. Witts, a somewhat remarkable intrenched 
work. It consists of two parts—(1) a mound, with a diameter at the 
base of about sixty or seventy yards, defended on the one side by the 
river Windrush, and on the other by a moat (now used as a road); and 
(2) a platform, defended on two sides by the river, and on a third side 
by an earth rampart, now about four feet high. Fifteen feet below the 
summit of the mound is a terrace about eighty feet wide. The top of 
the mound is nearly flat, and has a diameter of nearly thirty yards. 
Near the centre is a circular well, the lower part of which is carefully 
walled, and when examined thirty years ago by Mr Witts, was 
found to contain charcoal, burnt stones, coarse pottery, and bones. 
Mr Witts thinks the work is one of the post-Roman earthworks, such as 
Mr G. T. Clark, the well-known authority on ancient fortifications, has 
described. It may have been a village fortress erected by the Saxon 
Lord of the Manor, in the ninth or tenth century, as a place of refuge 
in case of a Danish raid. It does not look very formidable now, but 
when complete it had a massive timber building on the summit, and a 
row of strong paling around the edge of the mound and at the foot of 
the sloping bank. There is a somewhat similar structure at Trecastle, 
a few miles west of Brecon, and another a few miles from Castletown, 
in the Isle of Man ; and Sir John Maclean has described one somewhat 
similar at English Bicknor, in the Forest of Dean. 
Canon Broome-Witts described the church of St Peter, Upper 
Slaughter. Its chief interest lies in the insertion of a Perpendicular 
Tower within the original Norman Nave. 
Canon and Mrs Broome-Witts kindly entertained the Members at 
tea at the Manor House. ; 
Afterwards the drive to Burford was commenced. 
THE RISSINGTON DISTRICT 
Between Bourton Station and Bourton a halt was made at a gravel- 
pit, near the Cottage Hospital. Mr Richardson explained that the 
gravel here is similar to that which extends over the greater part of the 
Vale of Bourton. Having crossed the Dickler, the Members walked 
up the hill to Little Rissington (see text-fig. 1). The village is built 
upon the rock-bed of the Middle Lias, which forms a well-marked 
platform. A weil near the last cottage in the village indicates 
the position of the base of the Upper Lias, and another called 
‘“Bobble Spring” the top. The Upper Lias is about 100 feet 
thick here, as against 230 feet at Leckhampton Hill. The Inferior 
