secretary's report. 
477 
quartz pebbles from the Biinter beds, and Magnesian Limestone 
boulders. There is a similar deposit of drift at Cadeby, on the 
slope of the hill at the opposite side of the valley, indicating 
that at one time the gorge of the Don must have been filled 
with ice. As the result of the damming up of the waters, a great 
lake would be formed — a lake which the leader of the expedition 
(the Rev. W. Lower Carter) held must have extended from 
Bretton, north of Barnsley, to Ciiestertield, a distance of 30 
miles. There was not time to visit Conisbrough Castle, but 
the party walked through the beautiful gorge of the Don towards 
Doncaster, admiring on the way the fine escarpment in the 
Magnesian Limestone, with its fringing talus of limestone blocks. 
Luncheon was taken at Balby, after which a visit was paid to 
the brick pits, in which are fine sections of stiff boulder-clay 
(full of erratics), lying on a level eroded surface of Bunter sand- 
stone. According to Mr. Carter's view, the glacier moved through 
this old depression, scooping out the sandstone, and on its 
melting left the little valley full of boulder-clay. In confirmation 
of this theory, Mr. H. H. Corbett reported that when tlie founda- 
tions of the Doncaster Workhouse were dug a section of boulder- 
clay was exposed, in which were embedded pieces of Bunter 
sandstone, with every appearance of having been wrenched off 
with violence. From the Balby brickfields a short walk led to 
the little lateral valley of Loversal to the south-west of Balby, 
and draining into the Trent. This valley has been a considerable 
puzzle to geologists. Mr. Carter's explanation was that when 
the ice stretched up as far as Edlington and Clifton, the drainage 
of the central lake, up to 330 feet, would have to pass laterally 
along the edge of the glacier, and would be diverted down what 
is now the Loversal valley. This continued until the ice rose to 
the 350-foot contour, when the gorge was entirely closed. Then 
the overflow of the great lake took place by another gorge tiirough 
the Magnesian Limestone, where Kiveton Park Station now is, 
at 330 feet above sea-level. This ended the day's outing, and 
the party then took train from Doncaster for headquarters. 
The General Meeting was held at the Queen's Hotel, Barnsley, 
the Rev. C. T. Pratt, M.A., in the chair. Resolutions of regret 
were passed at the decease of Mr. J. B. Dewhurst (Skipton), 
