At eleven, the flood came in, six or eight inches perpendicular, with a roaring noise; and so soon as it had passed the brig, I set off with Mr. Brown and Mr. Lacy in the whale boat, to follow it up the small channel on the eastern shore; and having a fair wind we outran the tide and were sometimes obliged to wait its rising before we could proceed. At the end of six miles the small channel led across to the western side; and the rare opportunity of a landing place induced me to pitch our tent there for the night: two miles higher up, the whole breadth of the Sound was reduced to half a mile. The country here was a stiff, clayey flat, covered with grass, and seemed to have been overflowed at spring tides; though the high water of this day did not reach it by five feet. Three or four miles to the southward there were some hills, whence I hoped to see the course of the stream up to its termination; and having time before dark, we set off. The grass of the plain was interspersed with a species of sensitive plant, whose leaves curled up in, and about our footsteps in such a manner, that the way we had come was for some time distinguishable. From the nearest of the small hills, I set the bearings of Double and Pine Mounts, our tent, and the brig at anchor, by which this station was fixed as in the chart; but in order to reconcile the bearings, I found it necessary to allow 12° of east variation. Towards Double Mount and Shoal-water Bay, the country consisted of gently-rising hills and extensive plains, well covered with wood and apparently fertile. The stream at the head of Broad Sound could not be traced from hence more than three or four miles above the tent; but it may possibly run up much further to the south-eastward, though too small to be distinguished in the wood, or to be navigable for boats. To the south and westward there was a ridge of high land, which appeared to be a prolongation of the same whence the upper branches of Port Bowen and Shoal-water Bay take their rise, and by which the low land and small arms on the west side of Broad Sound are bounded. A similar ridge ran behind Port Curtis and Keppel Bay, and it is not improbable that the two are connected, and of the same substance; for at Port Curtis the basis stone of the country was a granite, and this small hill was the same. It has been more than once observed, that granite is amongst the substances which exert an influence upon the magnetic needle; and it is to the attraction of the ridge of mountains to the south and westward, that I attribute the great variation found in the bearings at this station.