^{page 563 note 1} Read before the British Association (Section C.) Norwich, 08, 1868.Google Scholar

^{page 565 note 1} Mr. George Maw, F.G.S., etc., upon the facts as detailed by the writer of the paper, has expressed an opinion (qualified by the consideration that he has not examined the place) that thehollow was the work of human agency.

^{page 565 note 2} The valley is cut through the lower beds of the ferruginous sandstone of the district; upon the slope so formed the gravel was deposited, and the ferruginous sandstone reposes upon the upper Lias clay. Neither of these beds contain sufficient calcareous matter to allow of any subsidence arising from the dissolving out and carrying away (by the action of water charged with carbonic acid in solution), of any considerable portionof their mass.

^{page 566 note 1} Read before the British Association (Section C.) Norwich, 08, 1868.Google Scholar

^{page 568 note 1} Read before the British Association (Section C.) Norwich, 08, 1868.Google Scholar