19TH APRIL,—I left the men with the cart, to follow while I rode forward along its track, and sat down to peruse the newspapers sent me, until the cart overtook me in the evening, the horses being quite exhausted by the heat and the heavy sand. Thermometer, at sunrise, 61°; at noon, 86°; at 9, 63°;—with wet bulb, 59°.
20TH APRIL.—The men who brought the despatches yesterday having been ordered to bring fresh horses this day from the depôt, I sent our tired animals on thither at once, as we could give them but a limited quantity of water. I rode forward also to the camp, and met the fresh horses about half-way. I immediately ordered the repair of the wheels of another light cart, determined to lose no time in exploring a passage towards the head of Carpentaria. Thermometer, at sunrise, 48°; at noon, 95; at 4 p.m., 93°; at 9, 63°;—with wet bulb, 58°.
21ST APRIL.—The cart came in about 9 a.m. The morning was cloudy, for the first time this month, and a slight shower fell. Had three or four days' rain fallen at that time, it would have enabled me to have explored by much less circuitous routes, than along the bank of this great river, the country to the north-west. In this case, the tour from which I had just returned might have been continued, as I wished and intended, had it been possible to find water, to the mountains or higher ground, whatever it might be that formed the limits to this basin on that side. Thermometer, at sunrise, 65°; at noon, 76°; at 4 p.m., 77°; at 9, 60°; —with wet bulb, 53°.
22D APRIL.—The clouds continued to lower, and a great change in the temperature accompanied this visible change in the sky, but the mercurial column remained uncommonly steady. Arrangements for a concentrated party engrossed my attention so fully this day, with the insertion also of our late work on the general map, that even the newspapers from the colony lay unread. Mr. Kennedy took a ride across the river in a S. S. E. direction, and found a fine grazing country with open forest, as far as he went, which was about twelve miles. On the banks of the Balonne, during my absence, they had found, besides a small bearded CYPERUS, a new creeping PSORALEA [*], and a new species of Acacia, which Mr. Bentham has named A. VARIANS.[*] Thermometer, at sunrise, 41°; at noon, 76°; at 4 p.m., 77°; at 9, 61°;—with wet bulb, 56°. Mean elevation of this camp above the level of the sea, being 50 feet above the river, 623 feet.
[* P. ERIANTHA (Benth. MS.) prostrata, canescenti-pubescens, foliis pinnatim trifoliolatis, foliolis ovatis oblongisve dentatis, pedunculis elongatis multifloris, floribus inferioribus remotis superioribus approximatis, calycibus pube molli albida dense tomentosis, legumine molliter villoso.]
[* A. VARIANS (Benth. MS.) glabra, pallida v. glauca, ramulis subangulatis, phyllodiis oblongo-lanceolatis v. inferioribus late obovatis summisve linearibus, omnibus basi longe angustatis apice obtusis v. oblique mucronatis subimmarginatis vix obscure glanduliferis uninervibus tenuiter reticulato-penniveniis, capitulis sub 20-floris solitariis subracemosis v. in racemos foliatos dispositis, calycibus truncatis, legumine glabro crasso sublignoso. Very near A. SALICINA, and possibly a mere variety; but the phyllodia are generally considerably broader, and the inflorescence different.]
Map IV. Advance to the Maranòa, and route returning to St. George's Bridge