grant you many years of health and fuccefs in your noble 
purfuit, for the. encouragement of Natural HisTORy, 
I have the Honour to be, 
With great refpeâ:, 
SIR, 
Your very obliged 
r-? 
And obedient humble fervant, 
EMANUEL MENDES da COSTA. 
London^ 22d June, 1778a 
