I have to thank Dr. Callaway for the courtesy and good-humour with which he has received my criticisms on his paper in the December Number of the GEOLOGICAL MAGAZINE. Would that all controversial fencing were conducted with equally well-tipped foils.

My Roman soldiers,inparticular, have been received with a kindness that reminds me of the friendly meetings of the British and French officers in the Peninsular War during brief seasons of armistice. Indeed, one might almost go so far as to say that friendly intercourse with these Koman cohorts has imbued Dr. Callaway with a taste for military tactics, and has inspired him to perform a masterly change of front under cover of the active advance of a line of skirmishers.