From Jillifri the _Endeavour_ ascended the river to Jonkakonda. The view which opened up before Park as he proceeded was neither attractive nor promising. The river flowed seaward deep and muddy, its banks covered with impenetrable forests of mangrove, forming when the tide was out a horrible expanse of swamp. The air was thick with a sickening haze, charged with the poisonous exhalations from the fœtid mud engendered by heat and moisture. Here and there only, a group of cocoa-nuts, or an isolated bombyx (silk-cotton tree) relieved the dreary monotony, and gave a momentary pleasure to the eye. [Map: MUNGO PARK’S TRAVELS. 1794-1805.] Behind the mangrove swamps the country spread out in a level plain, “very generally covered with woods, and presenting a tiresome and gloomy uniformity to the eye; but although nature has denied to the inhabitants the beauties of romantic landscapes, she has bestowed on them with a liberal hand the more important blessings of fertility and abundance.” At Jonkakonda, which seems to have been one of the chief trading stations on the river, Park left the _Endeavour_, and proceeded to the factory of Pisania, a few miles further on. In Dr. Laidley, the agent in charge, for whom he brought letters, Park found not only a generous host, but also a thoroughly competent adviser, and for several succeeding months the merchant’s house and wide experience were alike at his disposal. The objects to be attained by his expedition were--To reach the river Niger by such route as might be found most convenient; to ascertain its origin, course, and if possible its termination; to visit the chief towns in its neighbourhood, but more particularly Timbuktu and those of the Haussa country. Park’s ardent enthusiasm was ever tempered with the caution and prudent practical character of his race. Like an old campaigner he set about learning what was ahead of him, and otherwise preparing for his difficult and dangerous task. The Mandingo language had to be acquired, that he might come into more sympathetic touch with the natives, and be more independent of interpreters, ever a source of profound danger, and often the greatest obstacle to the advance of the explorer into unknown countries. In addition inquiries had to be made regarding routes, the dangers to be avoided, and the general condition of travel in these parts. Without such information it was clear to him that he would be as a blind man walking in a country beset with a thousand pitfalls.