Latitude 26 degrees South, Longitude 117 degrees 20 minutes East : Taken from Mount Hale on the Murchison River. This formation extends to longitude 120 degrees East, and is very magnetic, also very heavy. There must be a great deal of iron in it. The hills are very high, and the echo very remarkable. I have seen the same kinds of hills in latitude 29 degrees, longitude 120 degrees. Bare granite rocks sometimes in the vicinity, though not attached. (May 4th.) : Two small specimens of Micaceous Iron-ore with brown Haematite. Impossible to state the age. Similar ore occurs in Victoria, in Elvans in Porphyry, but it also occurs in Tertiary rocks. Latitude 26 degrees 17 minutes South, Longitude 119 degrees 54 minutes East : The water shed of the Murchison, after crossing which we entered the Triodia desert. Found oozing out of rock in the water-shed of the Murchison. : Brown Haematite, decomposing to yellow. (Tertiary.) Bituminous material. Mr. Cosmo Newbery reports that it is probably the result of the decomposition of the excrement of bats. It contains fragments of the wing cases of insects, and gives reactions similar to the bituminous mineral or substance found in Victoria. Latitude 25 degrees 14 minutes South, Longitude 121 degrees East : Peaks rising out of sandy Triodia desert. (May 29th.) : 5, Quartz; 6, Chalcedony; 7, Quartz; 8, Silky Shale (Silurian); 9, very Micaceous Schist (Silurian). Latitude 25 degrees 40 minutes South, Longitude 120 degrees 35 minutes East : Found in the Frere Ranges. : 10, Ferruginous rock (Tertiary); 11, portion of a seam or joint of a rock; 12, very fine soft purple slightly micaceous rock (Silurian); 13, white micaceous slaty sandstone (Silurian). Latitude 25 degrees 39 minutes South, Longitude 120 degrees 40 minutes East : This rock was broken off the face of the side of a bank of brook. It is rather soft, and would split; it is all in layers. I cut my initials in it with a chisel. : Purple brown slate (Silurian). Latitude 25 degrees 40 minutes South, Longitude 122 degrees 20 minutes East, Mount Moore : Many ranges and some grassy country running from longitude 122 to longitude 124 degrees, generally composed of this description of rock. : 15, Rough quartzite (conglomeritic) Tertiary; 16, rough quartzite with white band, brown and purple (Tertiary). Latitude 25 degrees 32 minutes South, Longitude 124 degrees 17 minutes East : Taken from rough range rising out of gently undulating desert. (July 5th.) : White flinty rock; consists in the main of Silica, with Magnesia and Alumina; it also contains water and traces of the Alkalies. It is probably derived from the decomposition of granite. The "rough ranges" are perhaps granitic. Latitude 26 degrees 6 minutes South, Longitude 124 degrees 46 minutes East : From a low table hill (Alexander Spring). : Translucent greenish quartz. Impossible to state the probable age.