By an azimuth of the sun's centre taken this morning, the magnetic variation was observed to be about 20 minutes west. Steering north 230 degrees east magnetic, soon brought us out of the hills into a plain extending as far as the eye could reach to the north-west, with a few patches of good grass upon it, but mostly covered with triodia, which was now just ripe, yielding fine heads of seed, which the horses are very fond of. At thirteen miles struck the channel of a considerable river coming from the south. As this offered us a fair prospect of working inland, and we had already attained nearly to longitude 116 degrees, or about the meridian of the mouth of the Alma, the stream was followed up for an hour, its average breadth being over 200 yards. At 4.40 encamped at a fine spring on the bank of a deep pool, under a cliff of metamorphic sandstone nearly 300 feet high; a cane, much resembling a Spanish red, growing in considerable quantities near the water. Camp 6. Latitude 21 degrees 18 minutes; longitude 116 degrees 4 minutes. SURPRISE A CAMP OF NATIVES. 30th May. Soon after starting this morning, we came upon a camp of fifteen or twenty natives, on the bank of a deep reach of water, hemmed in by steep rocky hills, up which they hastily scrambled on our approach, and on reaching the summit, tried by various gestures to express their disapproval of our visit, but would not hold any parley with us. At five miles the river turned abruptly to the north-east, through a precipitous rocky defile, which induced us to make an attempt to cut across and strike the river some miles higher up; but after being for some time involved in impracticable ravines, we were again obliged to have recourse to the bed of the river, although encumbered with beds of large stones, over which the horses had great difficulty in travelling; so that by sunset we had not accomplished more than six miles in a direct east by south line from last night's camp. Camp 7. Latitude 21 degrees 19 minutes 29 seconds. 31st May.