23 March

Journal, March 23.

I set off, accompanied by my black guide mounted, for the top of Marga,
and we reached it this time by a route in which the native displayed the
usual skill of his race. Certainly I never ascended a hill of more
perplexing features, all these heights being also of extremely difficult
access, very steep and extending in the direction of 10 and 12 degrees
East of North. They consist of the sharp edges of inclined strata of hard
purple-coloured clay-slate. I was however rewarded for the fatigues this
hill had cost me, on two different days, not with a fine view, for the
summit was too woody for that, but with a sight of some important points
determined during my late journey; and others which I had then observed
only from the Canobolas but which I was now enabled to fix by angles
observed from this station. The most important point visible besides the
Canobolas was Mount Lachlan, by means of which I determined the true
situation of Marga and the neighbouring hill Nangar; which is rather
higher but more wooded, and 2 1/2 miles distant towards the south-east.

These two form the summits of an isolated mountain mass on the left bank
of Byrne’s creek, the top of Marga being about 1000 feet above our camp

on its banks. I drew outlines (according to my usual custom) of all the

hills on the horizon before us, and took angles on them with the

theodolite. Descending by a shorter route I reached the camp in time to

protract my angles, whereby I ascertained to my great satisfaction that

both Marga and Nangar had been truly fixed from the Canobolas, as well as

other points observed in my former journey, the accuracy of which, by a

good angle with Mount Lachlan, I was thus enabled to prove without going

out of my way, besides establishing there a good base for extending the

survey southward.