Mr. Jukes-Browne's contribution to this subject, in the September number of the GEOLOGICAL MAGAZINE, brought out a clear reply from Professor Hull in the next issue. Here the argument practically ceased, for in his letter in November Mr. Jukes-Browne turned his correspondence into an academic disputation of the meaning of the word ‘escarpment,’ for which other expressions could have been used, and the flat denial of the evidence submitted by Professor Hull.