We were unable to proceed this day, owing to my having eaten some of the dwarf mesembryanthemum, which I had formerly observed to be used as food by the natives on the Gascoyne, but which had produced with me violent headache and vomiting. The horses were, however, enjoying excellent feed; and I contrived to work up my map and clear a lunar. 20th June. Started at 7.25 a.m. with nineteen horses, having been obliged to leave behind a horse belonging to Mr. Lennard, so lame that he could not move. Following the stream-bed nearly west for ten miles, came upon a pool of permanent water containing flags--the first we had met with since quitting the Hamersley Range. This was of great value, as there was no water that could be depended upon on our return, in the last sixty miles. Pushing on quickly for twelve miles further, the river entered a wide plain, in which was some tolerable feed; we had again, however, to halt for the night without water. DEPOT CAMP ON THE HARDEY RIVER. 21st June. Although the size of the channel of the river we had been following down for the last sixty miles had considerably increased both in width and depth, yet very little water had been found in it, and as it took a decided turn in its course this morning to north-west, after two hours' ride, without observing any change, and there being every appearance of its keeping the same course for the next twenty miles, I was convinced that it could not be a tributary to either the Edmund or Lyons, which I had at first hoped it might prove. The barometer also ranged too high for it to be at a sufficient elevation to admit of it flowing into either of those rivers, as the elevation of the Lyons at the confluence of the Alma is at least of the same altitude above the sea. Having named the river the Hardey, we fell back upon the pools passed yesterday, where I had decided upon forming a depot camp at which to rest the weakest horses, while with a lightly equipped party I proposed to complete the expedition of the country intervening between this and the Lyons River. Camp 26. Latitude 22 degrees 58 minutes 28 seconds; longitude 117 degrees 10 minutes. 22nd June.