As a recompense, however, for the difficulty of the ascent, I had the pleasure of finding some very interesting plants on its summit; particularly a small Acacia with verticillate leaves, which Dr.Binoe, the surgeon of H.M.

S.Beagle, had found on the north-west coast; and two other Acacias equally new to me, and which were afterwards found to extend to the heads of the South Alligator River.
From this hill we had a magnificent view of the country before us: it was enclosed on all sides by high mountain ranges, of which one in particular overtopped the rest.

Porphyry was observed on several spots; indurated clay frequently; and, on the top of the hill below which we encamped, I found quartz porphyry, and at the foot a psammite?
which I had met several times associated with talc-schiste.
April 21 .-- We continued our journey in a S.50 degrees W.course to latitude 19 degrees 13 minutes.

The country became still more mountainous; we passed, notwithstanding, many large well grassed flats, on which the timber grew to a greater size than we had observed it at the lower part of the river.

The poplar-gum was very frequent in the hollow, and low stiff flats extended parallel to the river.