I am highly gratified that some of the difficult problems connected with the Mammoth and its surroundings, which have been too long ignored, are at last attracting something like adequate attention; and I regret that Mr. Jukes-Browne should withdraw from the controversy without, as it seems to me, doing justice to the cause he represents. In his concluding letter he adds nothing but a reference fo Mr. Clement Eeid and Mr. Horace B. Woodward, neither of whom need a vicarious spokesman. I wish he had been able to point to one well attested example to prove his case. I must again press upon him the fact that mere rhetoric is of no avail in this or any other scientific discussion. What we need is to be pointed to some example within our four seas of the occurrence of a land-surface dating from the Mammoth period underlaid by true drift.