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discovery. With Mr. Belt I ascended the range in search of a road 
for the camels; a gully observed to the eastward will apparently 
meet our requirements. 
Wednesday, July 11th.—Camp No. 46; bar. 27-69in., ther. 24°; 
height 2,086ft.; lat. 23° 49’ 50” S. This morning Mr. Belt led 
the camels and horses to the gully discovered yesterday, about a 
quarter of a mile to the eastward of Edgar’s Spring. Here the 
euros and wallabies have made a fair track over a depression to the 
northern side of the range. Professors Tate and Spencer and I 
walked from the camp to the summit of the range. To the north 
we discerned several parallel ridges of the Macdonnell Ranges. 
Mount Conway, I found, bears 53° 45’, Brinkley’s Bluff 32°, and 
Paisley’s Bluff 90° 50’. Continuing on a bearing of 842° 40’, we 
passed, at one mile and two and a half miles, through two gaps in 
quartzite ridges having an east and west direction. At the latter 
gap we crossed the confluence of two large gum creeks, tribu- 
taries of the Hugh river. Here occurs a very striking and in- 
teresting geological change, which will be fully recorded in the 
geological report of the expedition. I have named the several gaps 
through which we have travelled Gill's Pass, after T. Gill, Esq., 
Under Treasurer of South Australia. Altered course to 386° for 
one mile and 79° 20’ for two and a half miles over grassy plains 
to the Hugh river, the trend of which is to the southward, through 
a break in a quartzite ridge about one mile to the south. Con- 
tinued on the previous course for an additional two and a half miles 
to the foothills of Mount Conway, a prominent mountain on which 
I erected a trigonometrical station in 1877. On ascending the 
highest point of these secondary hills I at once became convinced 
of the impossibility of discovering a practicable road to Paisley’s 
or Brinkley’s bluff through the ranges to the north. I therefore 
returned with Mr. Belt to the Hugh river, and followed it on a 
bearing of 22°, the rest of my party following at a slower pace. 
Low, rugged, micaceous schist rises abut on the river, causing its 
channel to be exceedingly rough and rocky. We passed numerous 
waterholes, and at one mile altered our course to 351° in the direc- 
tion of a gorge of singular appearance west of Paisley’s Bluff. At 
two and a quarter miles a large gum creek joins the Hugh river 
from the westward. At two and a half miles we ascended a rough 
stony ridge, and obtained an extensive view of surrounding country. 
To the west, north, and east high massive ranges apparently render 
further progress in those directions out of the question. Changed 
course to 98° (direction of this ridge), finding, at three-quarters of 
a mile that the Hugh river passes through a gap, in which we 
found a large and, I think, permanent waterhole. After directing 
