"Vessels from England bound to Port Adelaide, should, after leaving the
Cape of Good Hope, run to the eastward in 37 degrees or 38 degrees south
latitude, until they arrive in longitude 132 degrees east, when they may
haul to the northward, so as to get into latitude 36 degrees 25 minutes,
in longitude 135 degrees 30 minutes; then steer to the north-east, and
make Kangaroo Island, passing between which and a small island named
Althorpe's Island, they will enter Investigator's Straits. These Straits
form the western entrance to St Vincent's Gulf, and are so free from
danger, that it seems almost wonderful how any vessel can get on shore
without gross negligence. The only danger that can possibly affect a
vessel is the Troubridge Shoal, and this, by a little attention to the
lead, may be easily avoided, as on the south side of the shoal the water
deepens gradually from four to seventeen or eighteen fathoms. The shores
on the side of Kangaroo Island are bold and rocky, whilst on the north
side, on Yorke's Peninsula, they are low and sandy. In working up in the
night, stand no nearer to the north shore than nine fathoms, or to the
southward than twelve fathoms. You will have from sixteen to twenty
fathoms in the fair way--fine grey sand, mixed with small pieces of
shell. In working up St. Vincent's Gulf, you may stand to the eastward in
six fathoms, and towards the Troubridge Shoal in nine fathoms.
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