Proceeding to the north, from Kama-kama, we entered into dense Mohonono bush, which required the constant application of the axe by three of our party for two days. This bush has fine silvery leaves, and the bark has a sweet taste. The elephant, with his usual delicacy of taste, feeds much on it. On emerging into the plains beyond, we found a number of Bushmen, who afterward proved very serviceable. The rains had been copious, but now great numbers of pools were drying up. Lotus-plants abounded in them, and a low, sweet-scented plant covered their banks. Breezes came occasionally to us from these drying-up pools, but the pleasant odor they carried caused sneezing in both myself and people; and on the 10th of March (when in lat. 19d 16' 11" S., long. 24d 24' E.) we were brought to a stand by four of the party being seized with fever. I had seen this disease before, but did not at once recognize it as the African fever; I imagined it was only a bilious attack, arising from full feeding on flesh, for, the large game having been very abundant, we always had a good supply; but instead of the first sufferers recovering soon, every man of our party was in a few days laid low, except a Bakwain and myself. He managed the oxen, while I attended to the wants of the patients, and went out occasionally with the Bushmen to get a zebra or buffalo, so as to induce them to remain with us. Here for the first time I had leisure to follow the instructions of my kind teacher, Mr. Maclear, and calculated several longitudes from lunar distances. The hearty manner in which that eminent astronomer and frank, friendly man had promised to aid me in calculating and verifying my work, conduced more than any thing else to inspire me with perseverance in making astronomical observations throughout the journey.