It has been seen that Park's failure was entirely owing to the improper season at which his journey was undertaken, and that this circumstance was occasioned by a series of unforeseen delays arising from a great variety of causes. A slight difference in some of those accidents which retarded his progress to the Niger, might obviously have had a most material influence on the ultimate success of the expedition. Thus, for example, if he could have sailed for Africa immediately after receiving his official instructions, if his passage had been quicker, if fewer causes of delay had occurred on the coast and afterwards during the journey, and finally, if the rainy season, which is subject to some slight variations, had commenced a little later;--he might perhaps have been able to reach the banks of the Niger in good order, and with a loss comparatively small; and in that case might have proceeded on his journey eastwards at the conclusion of the rainy season with some prospect of success. But the safe arrival of Park's expedition at the Niger, which was only just possible in the actual circumstances of the case, would have been morally certain provided he had sailed from England (as he ought to have done) before the month of October, and had been ready to take his departure from the Gambia towards the interior at the end of November; from which time there is always an uninterrupted continuance of fine and healthy weather during a period of five months. Hence we may safely conclude that, supposing all reasonable precautions to be taken, an expedition similar to that of Park, may penetrate to the Niger and along the banks of that river as far as the eastern frontier of Bambarra, in good order and with very little loss; and this most important fact is justly considered by Park himself as being fully established by his own disastrous expedition. [Footnote: Journal, p. 140.]