SKETCH EXPLANATORY OF A USEFUL PRINCIPLE IN EXPLORATION.
North of the Namoi River, a line from B through A to C on the junction of
the Gwydir and Darling Rivers.
The situation of this junction afforded a curious illustration of the
principle which guided me in choosing my route from the great Namoi
Lagoon on the 14th of January. Having been then between two rivers (at A)
I chose the bearing of 20 degrees west of north, as given by the bearing
of the high land (B) in the opposite direction, and this junction (C) was
now found to be exactly in that line. That high land was a projecting
point of a range; the course of rivers is conformable to the angles of
such ranges, and therefore the rivers on each side of me (at A) were not
so likely to come in my way in the direction of AC, as in any other
direction I could have chosen. The chance of finding firm ground in that
direction was also better, as the rivers were only likely to continue
separate by the protrusion of some remote offset of ground between them,
from the salient feature B.

COURADA FROM THE PLAINS. A REMARKABLE HILL, AS IT APPEARS FROM THE NORTH.

BOAT-CARRIAGE USED IN THE TWO LAST EXPEDITIONS.

PLATE 10: INACCESSIBLE VALLEY OF THE RIVER GROSE.
Major T.L. Mitchell del. G. Barnard Lith. J. Graf Printer to Her Majesty.
Published by T. and W. Boone, London.

PLATE 11: MAP OF MR. CUNNINGHAM'S TRACK WHEN LOST IN THE WOODS.
Sketch showing the Route of Mr. Cunningham as traced by Assistant
Surveyor Larmer.
Published by T. and W. Boone, 29 New Bond Street.