On the banks here also we found yams and other roots, and had evident marks of the natives frequenting these parts in search of them for food. They have no doubt some method of preparing these roots, before they can eat them; for we found one kind which some of the company had seen the natives dig up; and with which being pleased, as it had much the appearance of horse-radish, and had a sweetish taste, and having swallowed a small quantity, it occasioned violent spasms, cramps in the bowels, and sickness at the stomach: it might probably be the casada root. We found here many traps, for catching animals, in which we observed the feathers of many birds, particularly the quail. We now gave up the hope of tracing this river higher up with our boats; and, as in case of heavy rains setting in, which might be expected at this season of the year, there would be considerable danger, while confined in this narrow part of the river, we pushed down and encamped the night of the 6th, about seven miles below Richmond-hill. In the morning early, we set off on our return, and encamped on the 7th at night, about twenty-six miles down: at seven in the morning of the 8th, we embarked again, and by four in the evening had reached a point about forty-three miles down, where we pitched our tents for the night, which was very foggy. In our way down, we stopped, and measured the perpendicular height of a hill on the north side of the river, (or more properly one of the banks of the river; for it is a long range of level land, and nearly perpendicular from the water; the opposite shore is low and marshy;) which I found to be 399 feet: the river was here 120 fathoms wide. On the 9th in the morning, we proceeded to examine some of the inferior branches; their general direction was to the southward, and the longest was not more than five or six miles in length, and was navigable for such boats as ours; the general depth was three and four fathoms for about four miles up, and then shoal water; the others were inconsiderable. In one of these branches we passed the night of the 9th, and saw a few natives, who came off to us in their boats with much chearfulness and good humour; I thought I had seen them before: they received a few presents, among which was a looking-glass, which we took much trouble to show them the use of: they were some time before they observed their own figure in the glass, but when they did, they turned it up and looked behind it; then pointed to the water, signifying that they could see their figure reflected as well from that.