The new geographical matter is presented to the public with confidence in its accuracy, derived as it is from careful and frequent observations of latitude; trigonometrical surveying with the theodolite, whereever heights were available; and, by actual measurement of the line of route. This route was connected, at its commencement and termination, with the trigonometrical survey of the colony; and, in closing on Mount Riddell, a survey extending two degrees within the tropics, the near coincidence of his intersections with that summit, as fixed by his survey of 1830, could not but be very satisfactory to the author.
The geological specimens collected during this journey have been deposited in the British Museum, and their original locality is shown on the maps by the numbers marked upon the specimens, so that they may be available to geologists; hence, in the progress of geological science, the fossils now brought from these remote regions will be accessible at any future time, and something known of the geology as well as of the geography of the interior. As Professor Forbes most readily undertook to describe the freshwater shells after the work had passed through the press, that portion of the collection also has thus been brought under the notice of geologists.
Objects of the expedition.--Unexpected delay--by reference to Lord Stanley.--List of the Party.--Departure from Buree.--Sheep stations.-- Scattered population.--Passage through Hervey's Range.--Encroachment of sheep on cattle runs.--A tea-totaller.--Meet an old acquaintance.-- Sulphureous springs.--Currandong--Necessity for damming up the Bogan. Leave Bultje's country.--Ephemeral existence of Aborigines.--Line between the squatters and the wild natives.--Velocity of the Bogan.--Supply of young bullocks.--Richard Cunningham--Young cattle troublesome.--A night without water.--Distress from heat and thirst.--Excessive heat.--Reunion of the party.--Melancholy fate of the Bogan tribe.--Interesting plants discovered.--Encampment at Mudaà.--Carry water forward.--Arrive at Daròbal.--Nyingan.--Water at Canbelègo.--Discovery of a lagoon.--Encamp near Canbelègo. Explore the Bogan in search of water.--Long ride.--Quit the Bogan.--Party attacked with ophthalmia