In researches of this kind, and in observing the manners and customs of the natives, in a country so little known to the nations of Europe, and furnished with so many striking objects of nature, Mr. Park's time passed not unpleasantly, and he began to flatter himself that he had escaped the fever, to which Europeans, on their first arrival in hot climates, are generally subject. But on the 31st July, he imprudently exposed himself to the night dew, in observing an eclipse of the moon, with a view to determine the longitude of the place; the next day he found himself attacked with fever and delirium, and an illness followed, which confined him to the house the greater part of August. His recovery was very slow, but he embraced every short interval of convalescence to walk out and examine the productions of the country. In one of these excursions, having rambled farther than usual in a hot day, he brought on a return of his fever, and was again confined to his bed. The fever, however, was not so violent as before, and in the course of three weeks, when the weather permitted, he was able to renew his botanical excursions; and when it rained, he amused himself with drawing plants, &c. in his chamber. The care and attention of Dr. Laidley contributed greatly to alleviate his sufferings; his company beguiled the tedious hours during that gloomy season, when the rain falls in torrents, when suffocating heats oppress by day, and when the night is spent in listening to the croaking of frogs, the shrill cry of the jackal, and the deep howling of the hyena; a dismal concert, interrupted only by the roar of tremendous thunder. On the 6th of October the waters of the Gambia were at their greatest height, being fifteen feet above the high water mark of the tide, after which they began to subside; at first slowly, but afterwards very rapidly, sometimes sinking more than a foot in twenty-four hours: by the beginning of November the river had sunk to its former level, and the tide ebbed and flowed as usual. When the river had subsided, and the atmosphere grew dry, Mr. Park recovered apace, and began to think of his departure; for this is reckoned the most proper season for travelling: the natives had completed their harvest, and provisions were everywhere cheap and plentiful.