t ”8 3 
VI. A Letter from Sir Hans Sloane Baronet , 
late Pr •. R. S. to Martin Folkes Ef quire 
Pr. R. S, containing Accounts of the pre- 
tended Serpent- ftone called Pietra de Cobra 
de Cabelos, and of the Pietra de Mom- 
bazza or the Rhinoceros Bezoar, together 
with the Figure of a Rhinoceros with a 
double Horn. 
SIR, Chelfea, April 19 , 1749 . 
Read April 2o.T'pj£R < E Tend you to be communicated 
* 749 ‘ to the Society , if you think proper, 
an Account of two pretended Stones, faid to be 
found in the Head of the mod venomous Snake of 
the Eaft Indies called Cobra de Cabelo, together 
with an Account of what I have heard, and what 
I believe they really are. The firft I have heard 
and do believe to be a Stone found in the Sto- 
mach or Inteftines of the Rhinoceros ; not, that I 
know, taken notice of by any Natural Hihorian, ex- 
cepting Redi. The Place where it is faid to be 
found is on the South-Eaft Coaft of Africa , accor- 
ding to the Information Redi had of it, and from 
which Place I had the two Horns figured in thefe 
TranfaAionSy N p . 4 /o, by Dr. Parfons, which were 
tied together acrofs, the better I believe-to preferve 
the fhort Skin that connc&ed them on the Nofe of 
that Animal, fo that the ftrait and crooked Horn 
might appear diftinft, as they do in a very intire 
Email brafs Medal of Domitian in my Collection. 
Whether 
