Thermometer, at sunrise, 21 deg.; at 4 P.M., 65 deg.; at 9, 44 deg.. 16TH JULY.--After some examination of the valley before us, I considered it best, upon the whole, to travel in the bed of the river itself, and thus avoid the frequent necessity for crossing with so much labour and delay: the sandy bed was heavy for the wheels, and therefore distressing to the animals, and one or two rocky masses obliged us to work out of it, to get round them. The whole day was consumed in proceeding thus about 51/2 miles, and in an easterly direction. The closing in of the valley lower down, seemed to shut us from further progress even so, and I encamped, rather at a loss how to proceed. Just then Mr. Stephenson came to inform me that he had seen, from a rocky point on the left, an opening to the north-west, and level ground beyond it. I therefore determined to accompany him next day, and to reconnoitre the country in that direction. By digging in the bed of the creek, water was again obtained by Corporal Graham. Some extremely fragrant shrubs were discovered in these rocky recesses, especially one, which filled the air with perfume to a great distance around. It seemed to be a EUCALYPTUS without flowers or fruit, but with a powerful odour of balm, and formed a bush five feet high, growing on sandstone rocks, having a narrow leaf, and rather thorny stalk. The lower leaves were also rough.[*] There was another bush, with leaves of the same shape, and glossy, but having a perfume equally strong of the lime.[**] We regretted much, that neither the seed, flower, nor fruit of these interesting shrubs could be obtained at that season. In that valley, we saw also the DAUCUS BRACHIATUS, an inconspicuous weed, and MYOPORUM CUNNINGHAMII. The soft leaved ACACIA PODALYRIOEFOLIA began to indicate its flowering season, and we found a magnificent new crimson CALLISTEMON with its young flowers and leaves wrapped in wool.[***] A new DODONOEA with wingless, 3-cornered, 3-celled fruit[****]; a new species of AOTUS, with narrow hoary leaves[*****], and one of the forest trees was a splendid new GEIGERA, with broad lance-shaped leaves.[******] The PLATYZOMA MICROPHYLLUM, a very singular and little known fern, with narrow leaves and small orbicular leaflets, was also there, with the ACACIA FALCATA, ACACIA EXCELSA, and a shaggy-leaved variety of the AJUGA AUSTRALIS, the Australian bugle. The BRUNONIA SERICEA, with its scabious- like heads of flowers, was common; and the blue flowered HARDENBERGIA MONOPHYLLA was observed among the grass. Thermometer, at sunrise, 25 deg.; at 9 P.M., 41 deg.. [* E. MELISSIODORA (Lindl. MS.); ramis ferrugineo-tomentosis scabris, foliis utrinque papillis rubiginosis scabris ovato-oblongis obtusis supra basim peltatis (floribus fructibusque ignotis).]