[* The process of Mr. Stephenson was as follows:--"Two pounds of the green leaf were boiled in eight quarts of water for half an hour, then strained and evaporated nearly to dryness. The mass was then submitted to a red heat for half an hour. The residuum was next digested in one pint of water, filtered, and again evaporated to six ounces. It was then exposed to the sun's rays, which completed the desiccation; crystals of a cubic shape having previously been formed."] 10TH FEBRUARY.--This morning the natives caught, in a hollow tree, an animal apparently of the same genus as the DIPUS MITCHELLII, and which seemed to live solely on vegetables. The barometer had fallen three millimetres last evening, and by noon this day it had declined three more. A fresh breeze blew from N. N. E., and at 2 P.M. a dark thunder cloud came from the S. S. W. and passed over the camp. The thunder was very loud, the lightning close and vivid; the wind for some time high, and rain heavy. The sky was, however, clear by 4 P.M., except in the N. E. where the thunder continued. Thermometer at sunrise, 75 deg.. 11TH FEBRUARY.--The real "Duck Creek" was still to the northeastward of our camp, as Mr. Kennedy had ascertained when on the Macquarie. I hoped to find in it water sufficient at least to serve the party halting on it one night, on its way to the Macquarie, by which line alone I was now convinced water enough might be obtained to supply the party until it could arrive at the Darling; I therefore rode this day to examine it, with the elder native. I followed the bearing of N. N. E. from our camp, a direction in which it was likely to be met with, so as equally to divide the journey of the drays to the Macquarie, into two days. I crossed plains covered with luxuriant crops of very rich grass, and at length obtained a sight of Mount Foster bearing east. I reached Duck Creek (that of Sturt), or the "Marra" of the natives, ascertained by the bearing of Mount Foster, the native name of which is Narrab. I examined the bed of the Marra downwards for about two miles, without seeing therein the least indication of water, and returned to the camp fully resolved to proceed next day to the Macquarie, so as to reach it a little way below Mount Foster, a distance in that direction rather too great for the cattle to travel over in one day. Thermometer at sunrise, 59 deg.; at noon, 73 deg.; at 4 P.M., 76 deg.; at 9, 61 deg.;--with wet bulb, 57 deg.. From an average of twenty-five observations of the mercurial column, the height of this station has been determined to be 566 English feet above the level of the sea.