11th. Osborn busy with the shoeing. Went with Billy to Wilson's Bluff, and saw the boundary-post between South and Western Australia, placed by Lieutenant Douglas. Returned at sundown. 12th. Erected the flagstaff with the Union Jack flying, and nailed a copper plate to the staff, with the following engraved on it:-- WESTERN AUSTRALIA. ERECTED BY J. FORREST, JULY 12TH, 1870. From the flagstaff, Wilson's Bluff bore North 70 degrees 15 minutes East magnetic, and the Black Beacon North 246 degrees 20 minutes East magnetic, and it is situated in latitude 31 degrees 41 minutes 50 seconds South. 13th. There was a total eclipse of the moon in the morning. All busy preparing for a start for the Head of the Bight to-morrow. Buried a cask eight feet west of flagstaff, containing 100 pounds flour, 130 pounds barley, 16 new sets of horse-shoes, shoeing nails, etc. Nailed a plate on flagstaff, with DIG 8 FEET WEST on it. Took a ride to the Black and Red Beacons, to examine country round Eucla. 14th. Bidding farewell to Eucla and the Union Jack, which we left on the flagstaff, we started for the Head of the Bight, carrying over thirty gallons of water with us, and walking in turns. Ascended the cliffs without difficulty, and passed the boundary of the two colonies; then left the sea, and, steering in an East-North-East and North-East direction until a little after dark, camped on a grassy piece of country, without water for our horses. Distance travelled about twenty-six miles. By observation camp is in latitude 31 degrees 30 minutes 42 seconds South, and longitude 129 degrees 20 minutes East. SUFFERING FROM THIRST. 15th. Started at daylight, and travelled East-North-East for seven miles, when we bore East over generally level country, well grassed, but entirely destitute of water. We camped at sundown on a grassy rise, without water for our horses. Distance travelled, thirty-four miles. The horses have not had any water for two days, and show signs of distress. Intend starting before daylight, as there is a good moon. 16th. At 1 a.m. went with Billy to bring back the horses, which had again made off. After returning, saddled up, and at 4.50 a.m. got under way, steering a little to the south of east in order to make the cliffs, as there might be water in rock holes near them. At eighteen miles came to the sea, but could find no water. At thirty miles saw a pile of stones, and at thirty-three miles saw a staked survey line. Camped on a grassy piece of country, two miles from the sea. This is the third day without a drop of water for the horses, which are in a frightful state. Gave them each four quarts from our water-drums, and I hope, by leaving a little after midnight, to reach the Head of the Bight to-morrow evening, as it is now only forty miles distant. By observation, camp is in latitude 31 degrees 32 minutes 27 seconds South, and longitude 130 degrees 30 minutes East.