latitude 21 deg. 20' 30" south. The bank is a
coarse sand; it extends two miles from the land, and on it there is from
twenty to forty fathoms water. The small creek before it affords convenient
landing for boats at all times of the tide; which here, as well as at the
other islands, rises about four or five feet, and is high water on the full
and change days about seven o'clock. The island of Tongatabu is shaped
something like an isosceles triangle, the longest sides whereof are seven
leagues each, and the shortest four. It lies nearly in the direction of
E.S.E. and W.N.W.; is nearly all of an equal height, rather low, not
exceeding sixty or eighty feet above the level of the sea. This island, and
also that of Eaoowee, is guarded from the sea by a reef of coral rocks,
extending out from the shore one hundred fathoms more or less. On this reef
the force of the sea is spent before it reaches the land or shore. Indeed,
this is in some measure the situation of all the tropical isles in this sea
that I have seen; and thus nature has effectually secured them from the
encroachments of the sea, though many of them are mere points when compared
to this vast ocean. Van Diemen's Road, where we anchored, is under the
northwest part of the island, between the most northern and western points.
There lies a reef of rocks without it, bearing N.W. by W., over which the
sea breaks continually. The bank does not extend more than three cables
length from the shore; without that, is an unfathomable depth. The loss of
an anchor, and the damage our cables sustained, are sufficient proofs that
the bottom is none of the best.

On the east side of the north point of the island, (as Mr Gilbert, whom I
sent to survey the parts, informed me) is a very snug harbour, of one mile
or more in extent, wherein is seven, eight, and ten fathoms water, with a
clean sandy bottom. The channel, by which he went in and out, lies close to
the point, and has only three fathoms water; but he believes, that farther
to the N.E. is a channel with a much greater depth, which he had not time
to examine. Indeed, it would have taken up far more time than I could spare
to have surveyed these parts minutely; as there lies a number of small
islets and reefs of rocks along the N.E. side of the island, which seemed
to extend to the N.E. farther than the eye could reach. The island of
Amsterdam, or Tongatabu, is wholly laid out in plantations, in which are
planted some of the ri