And the “Great Carolina Marl Bed.” 67 
tain nearly SIXTY PER CENT. OF PHOSPHATE oF LIME. 
Dr. Pratt then said: “The question with me now is, 
the extent of the formation, and this must be looked 
into at once.” Again we rejoined, “ This is well 
known, and though we cannot take you up to the 
Ashley, to-day, because of engagements at the Col- 
lege, we will send Mr. Jonathan Lucas with you to- 
morrow, and you can then see and judge for yourself; 
for he knows the stratum and its outcrop, having 
been with us during the war, whilst engaged manu- 
facturing saltpetre.” At the same time we also told 
the Doctor that the extent of this deposit was marked 
upon a map which was still in our possession, and 
it should be looked for. The map was afterwards 
found and submitted to him for examination. 
The necessary arrangements being made, Dr. Pratt 
left the next day with Mr. Lucas for Ashley Ferry, 
saw the rock zz setw, and admitted “it surpassed his 
anticipation.” On the very day the Doctor and 
Mr. Lucas were visiting the Ashley, we received 
Ansted’s book from London, on the Geology of the 
Cambridge Beds of Phosphates, giving in detail the 
analysis of a rock similar to that of the Ashley, and 
discovered sometime during our Confederate War. 
His description of the Cambridge rock corresponds in 
almost every particular with that of the Ashley Beds, 
and in a most remarkable manner corroborated our 
statement made years ago, viz: that Charleston was 
located geologically, on the same formation as that of 
the great City of London.* 
*Holmes’ Notes, Geology of Charleston, 1849. 
