' { 23 « ] 
XXXV. A Letter upon the fame SubjeB from 
the Rev. Richard Pococke, LL.D. Arch- 
deacon of Dublin,' to the Rev. Tho, Birch, 
D. D. Seer. R. S. 
Dear Sir, Dublin, June 18, 1753. 
Bead June 28, X Received the favour of your obliging 
,753 ‘ Jl letter; and I return my hearty thanks 
to the Royal Society for their kind reception of the 
obfervations, which I fent them on the Giant’s Caufe- 
way. I am fenfible, that it is difficult to make any 
fuppolitions on fuch a fubjedt, that may not be lia- 
ble to fome objections ; but I ffiall be very glad, if 
mine put any one upon making more happy conjec- 
tures. 
This day Mr. Drury brought me two maps of the 
Caufeway ( fee Tab. XI.), one a view from the top 
of the cliff, and the meafures as he pac’d; the other 
from my meafures by a line; in which the let- 
ters anfwer to thofe in the engraving after his lifter’s 
drawing. I have fent them to you, as Mr. Folkes 
fome time ago defired to know how far the Caufeway 
extended into the fea. 
I have alfo fent you four drawings by Mr. Drury, 
of two curious ftones, which I brought to Dublin. 
I am. 
Dear Sir, 
Your moft obedient humble fervant, 
Richard Pococke. 
XXXVI. 
