2nd. That the deepest indentation as yet discovered of the division of the waters, was at the sources of that river, and corresponded with the greatest elevation indicated by the barometer (about 2500 feet); and, 3dly. That there, I. E. under the parallel of 25 deg. S., the highest spinal range must extend westward, in a line of truncated cones, whereof Mount Faraday appeared to be one. I accordingly determined to retrace our wheel-tracks back to the head of the Salvator, and to explore from thence the country to the north-west, as far as our stock of provisions and the season would permit. I had marked my camps by Roman letters cut deep in sound trees, and at this, I left the number LXIX. cut under the initials of the colony, N.S.W.; this being the number marked from the Culgoa. We had, at least, laid out a good carriage road from the colony to a river in M. Leichardt's route; which road, as far as we had marked it with our wheels, led through pastoral regions of much greater extent than all the colonists now occupied. At this farthest point traced by our wheels within the Tropics, the plants were still known to botanists, but with some interesting exceptions. We here found the CASSIA HETEROLOBA in flower; also the burr plant, CALOTIS CUNEIFOLIA of Brown; the PITTOSPORUM LANCEOLATUM of A. Cunningham, a shrub with yellow flowers and narrow willowy leaves; and the beautiful laurel-leaved GEIGERA LATIFOLIA was still conspicuous among the forest trees. But here also we found a very fine new species of STENOCHILUS[*], a new pine-leaved DODONOEA, allied to the D. PINIFOLIA of Swan River[**], and a most singular hard-leaved shrub, with spiny foliage resembling five pointed stars, proved to be a new species of LABICHEA.[***] Thermometer, at sunrise, 36 deg.; at noon, 71 deg.; at 4 P.M., 70 deg.; at 9, 35 deg.;--with wet bulb, 30 deg.. [* S. PUBIFLORUS (Benth. MS.) foliis lanceolato-linearibus elongatis integerrimis apice subuncinato novellis ramulisque tomentellis mox glabratis, calycis foliolis lanceolatis, corollae pubescentis inferne attenuatae laciniis oblatis infima breviter soluta.--This agrees pretty well with Brown's short diagnosis of S. LONGIFOLIUS, as well as with Cunningham's specimens so named; but those have no corolla, which Brown also had not seen, and his is a south coast plant. (Another new species with leaves like this, but very different flowers, was gathered by Sir T. Mitchell in his former expedition.)] [** D. ACEROSA (Lindl. MS.); foliis tenuibus acerosis subfalcatis glandulosis, corymbis axillaribus paucifloris folio brevioribus, capsulis tetrapteris alis apice rotundatis.] [*** L. DIGITATA (Benth. MS.) ramulis tomentellis, foliis subsessili bus, foliolis 3-5-digitatis lineari-oblongis spinoso-mucronatis coriaceis reticulatis terminali caeteris vix majore, antheris parum inaequalibus conformibus.]