Mr. Clement Reid's explanation of the broken and contorted condition of the Chalk seems to me quite incomprehensible. Let us analyze the position rather more closely. The champions of ice as the cause of the phenomenon we are discussing appeal to it in two forms—ice-sheets and icebergs. Mr. Eeid was, I believe, the originator of the notion that the dislocations of the Norfolk Chalk were due to an ice-sheet, which means an ice-sheet occupying the North Sea.