Hippalus was the pilot who first discovered the direct course across
the ocean, by observing the position of the ports and the general
appearance of the sea; for, at the season when the annual winds peculiar to
our climate settle in the north, and blow for a continuance upon our coast
from the Mediterranean, in the Indian ocean the wind is constantly to the
south west; and this wind has in those seas obtained the name of Hippalus,
from the pilot who first attempted the passage by means of it to the east.
"From the period of that discovery to the present time, vessels bound to
India take their departure either from Kane on the Arabian, or from Cape
Arometa on the African side. From these points they stretch out to the open
sea at once, leaving all the windings of the gulfs and bays at a distance,
and make directly for their several destinations on the coast of India.
Those that are intended for Limurike waiting some time before they sail,
but those that are destined for Barugaza, or Scindi, seldom more than three
days."
If we may credit Pliny, the Greek merchants of Egypt for some years after
the discovery of the monsoon, did not venture further out to sea than was
absolutely necessary, by crossing the widest part of the entry of the
Persian Gulf, to reach Patala at the mouth of the Indus; but they
afterwards found shorter routes, or rather stretched more to the south, so
as to reach lower down on the coast of India:
