V.—On the included Pebbles of the Upper Neocomian Sands of the South-East of England, especially those of the Upware and Potton Pebble Beds

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Abstract
It has often appeared to me that in working out the ancient physical features of the earth in former periods of its history, too little attention has been given to one simple set of evidences which are of wide-spread occurrence, and, frequently, of very clear and decided meaning. I refer to the included rock-fragments of conglomeratic deposits. An appeal to these fragments would, I believe, often bring out clearly-written facts of no small value for the elucidation of the nature of ancient sea-margins, as compared with the much-involved palæontological evidences with which we are made so much more familiar.

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