[** T. GLAUCA (Lindl. MS.); spinosa, foliis coriaceis integerrimis crenatisque linearibus glaucis obtusis retusisque, floribus trimeris dodecandris 2-3nis brevi-pedicellatis.] It is much to be regretted, that the specimens gathered here of the brigalow, should have been so imperfect that they could not be described. If an Acacia, Mr. Bentham says, it is different from any he knows. The vicinity of the river here affords security for a supply of water, in seasons like the present, when any contained in the smaller channels may be dried up. In the afternoon we lost a horse, which fell from a precipitous part of the bank, at the junction of the creek with the river. One man was leading four, when one horse kicked another, which, falling perpendicularly, from a height of about forty feet, was so much hurt as to be unable to rise. The folly, or rather obstinacy of the man, leading so many together, on the verge of a precipice, was contrary to particular orders previously given, and which ought to have been enforced by Graham, who was in charge. Thermometer, at sunrise, 32 deg.; at noon, 78 deg.; at 4 P.M., 79 deg.; at 9, 60 deg.;--with wet bulb, 45 deg.. 18TH OCTOBER.--The horse, still unable to get on his legs, and apparently dying, was shot, and buried in the sand of the bed of the creek. This loss, when we were so near our depot camp, was much to be regretted, as we should have otherwise taken back every bullock and horse, after an absence, from that camp, of four months and fifteen days. We saw not a single native about the woods or the river, and were, therefore, the more anxious to know how Mr. Kennedy and the natives had agreed at the depot camp, now within a day's ride of us. We continued to follow our former track to Camp XXXI, and it may be remarked, to their credit, that the aborigines had not attempted to deface any of these marked trees. It might have occurred, even to them, that such marks were preparatory to the advent of more white men into their country. The fine, deep reaches in the river, looked still full and unfailing; and a short journey to- morrow would take us to the camp of the rest of the party. We this day found a little jasmine in flower, of which Mr. Stephenson had formerly collected the seeds. It was white, not more than a foot high, with solitary white flowers, emitting a delightful fragrance, and it grew in the light sandy forest land.[*] A tree loaded with pods, which the natives eat, has been determined by Sir William Hooker to be the BRACHYCHITON POPULNEUM, Br., or STERCULIA HETEROPHYLLA of Cunn. Here was picked up a singular little annual plant, belonging to the genus PIMELEA, with hairy, loose spikes of minute green flowers[**]; and by the river we found the CALANDRINIA BALONENSIS.