148 
rocks, and those of a generally larger size, than are usually 
met with in that deposit. It is remarkable that this bed of 
drift, although seen and cut through on the hill side about 
50 feet above the level of the valley, the latter below and 
indeed all the way to Todmorden afforded so far as we 
could discover, no more Till. In a paper read before the 
Manchester Geological Society in 1842, and published in its 
Transactions of the following year, the author stated that 
he had little doubt but that some of the most ancient por- 
tions of the drift had passed the Pennine Chain through 
the valley of Todmorden to Hebden Bridge, by the Summit 
Valley above Littleborough. No doubt that some drift has 
passed, as we have ourselves found granites and foreign 
rocks at Hebden Bridge and at other places in the valley of 
the Calder, but up to this time, so far as we know, no 
deposit of Till has been found to the north of the patch 
now described. 
Professor Hull, F.R.S., in a letter in the “Geological 
Magazine,” Vol. III., p. 474, alludes to this part of the valley 
near where the Till is situated as affording no evidence of 
having been excavated by the stream flowing in it at the 
present time; and he notices the remarkable flat water- 
shedding in the valley. Mr. A. H. Green, F.G.S., in his 
excellent Memoir on the Geology of North Derbyshire and 
the adjacent parts of Yorkshire, at p. 131, when speaking 
of the passage of the drift across the Pennine Chain , says, 
“The valley of the Calder cuts right .across the ridge; so 
far as we know no drift is found in it at the summit level, 
but at Hebden Bridge and at Elland boulders of granite and 
other foreigners are found, and at the latter place in fair 
plenty.” The accompanying wood cut, Fig. 1, is a section 
