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good deal of attention to the Drifts, and I visited the sources of the Severn, Wye, 

 and Usk foi the purpose of examining the character of the river deposits among 

 the hills of Wales. I afterwards pronounced an opinion that it was impossible 

 to account for the transportation of the large rock masses, many sharp and 

 angular, in the ancient river beds, without calling in the agency of melting snow 

 and floating ice which stranded blocks from the Longmynd and Clee Hills on the 

 Old Red Sandstone of Lugwardine, near Hereford, or masses of Dudley " toad- 

 stone " on the banks of the Severn at Upton-on-Severn. 



It was, I believe, during this latter cold period that our rivers were so much 

 more torrential than they are now." 



