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CHAPTER VL 
TThe true position of Myos Hormus, at the upper end of the Red 
Sea, being very doubtful, it seems to me that it would be a more 
clear method of ascertaining the places mentioned by the author of 
the Periplas, to measure his distances from Aduli, which, I think, 
has been fixed near Massowah by Dr. Vincent, in a most incontro- 
vertible manner^ 
I most fully agree with this able and learned elucidator of the 
Periplus, that the ancient positions are much more accurately to be 
ascertained by existing circumstances, than by the astronomical 
observations, which were originally made with very imperfect in- 
struments, and have come down to us with numerous errors and 
imperfections ; and it is for this reason, that 1 consider the position 
of Aduli as ascertained ; for not a circumstance is mentioned in 
the Periplus, as belonging to it, which cannot be discovered in the 
Bay of Massowah. The Island of Diodorus, which was separated 
from the main-land by so narrow a channel as to be ford able at low- 
water, is easily referred to Toualout ; while the Orine, to which the 
merchants retired, on their being plundered in their former resi- 
dence by the Barbarians, is now satisfactorily ascertained to be Va- 
lentia Island, whose numerous hills well intitle it to its ancient name, 
whose distance of seventeen miles from the coast of Aduli accords 
with the two hundred stadia mentioned m the Feriplus, and whose 
embosomed situation in Annesley Bay, explains the hitherto iii- 
