I found the country perfectly impracticable to the N.W., and that it was impossible to ascertain the real character of this Sandy Basin.

On the other side of it the country appeared to be wooded; beyond the wood there was a sudden fall; and, as far as I could judge, this singular feature must have been connected with Spencer's Gulf, before the passage that evidently existed once between them, was filled up.
On the 5th I ran a base line from the end of the chained line to the north-west, on a bearing of 317 degrees, to the only prominent sand hill in that direction, distant from the staff 5 1/2 miles, from the extremities of which the ranges bore as follow:-- BEARINGS FROM THE FLAG STAFF AT THE TERMINATION OF THE CHAINED LINE.
To a bluff point in the main range 198.00 To the north point of the south range 188.40 To the north point 182.50 To the highest point in south range 187.00 To the flat-topped hills 231.00 To the north-west point of the lake 283.00 To the south point 158.00 BEARINGS FROM THE NORTH-WEST EXTREMITY.
To the bluff 194.30 To the north point of south range 184.00 To the south 183.00 To the flat-topped hills 176.30 To the north-west extremity of lake 275.00 The angles given by these bearings were necessarily very acute, but that could not be avoided.

With the bearings, however, from a point in our chain line, 16 miles to the rear, they gave the distance of the more distant ranges as 65 miles, that of the nearer ones as 33.
Our latitude, by altitudes of Vega and Altair, on the night of the 5th of August, was 29 degrees 14 minutes 39 seconds, and 29 degrees 15 minutes 14 seconds; by our bearings, therefore, the flat-topped hills were in lat.

29 degrees 33 minutes, and the bluff, in the centre of the distant chain, where there appeared to be a break in it, in 30 degrees 10 minutes, and in long.

139 degrees 12 minutes.
Presuming our Depot to have been in lat.