A hill 145 feet high, the loftiest point of the group, rises near the
centre of Tremouille, the north-east island, off the north-west end of
which a ledge extends in the direction of an out-lying reef, bearing
North 55 degrees West (magnetic) nine miles and a half, which places it
in latitude 20 degrees 17 minutes South and longitude 0 degrees 26
minutes West of Swan River; or 115 degrees 21 minutes East. This could be
no other than that which we had so often looked for as Ritchie's Reef, as
our former tracks to the westward had assured us that it did not lie in
that direction. In latitude it agreed with the position given to it on
the charts, but in longitude it differed considerably, lying full half a
degree to the eastward. It therefore appeared not to be a discovery of
Lieutenant Ritchie's, as it had been not only seen previously by the
French, who had considered it as a reef extending off Tremouille Island,
but many years before by Captain Clerke, who placed it in latitude 20
degrees 18 minutes South, nine or ten miles North-West (magnetic) from
what he thought to be Rosemary Island, but which it is very evident was
Tremouille. The name then of Clerke's Reef should be given it instead of
Ritchie's.

WALLABY SHOOTING.

Mr. Fitzmaurice having seen plenty of wallaby on the larger islands, a
party of us went on shore in the evening, after securing observations for
the rates of the chronometers on a small islet called Flag Islet, near
the centre of the rocky cluster fronting the eastern side of Hermite
Island. This can be recognised by it alone having a sandy point on the
south-west end, which we placed in latitude 20 degrees 27 minutes 47
seconds South and longitude 0 degrees 8 minutes 20 seconds west of Swan
River. The time of high-water here at full and change, was about 10
o'clock, when the tide rose fourteen feet; the flood-stream came from the