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the lead apt to attract the obfervation of travellers, who, 
engaged in other purfuit, mud be indebted to ac- 
cident for the knowledge of fuch things, as the na- 
tives feldom talk of, from the belief that they are 
known to all the world. This confideration may, 
in fome meafure, account for inoculation having been 
over-looked by thofe who have tranfiently paffed 
through thefe countries ; and is all we can offer as 
an apology, for the having remained fo long unac- 
quainted with a fad. in medical hidory, in a fitua- 
tion where we both had fo many opporunities of in- 
formation. I am. 
Dear brother. 
Mod: affedionately yours, 
Aleppo, Nov. 26, 
1767. 
P. Ruflel, 
XXI. Part 
