After this incident the expedition continued its progress up the White Nile. The sudd which was met with two days' journey south of Khartoum did not in this part of the Nile offer any obstacle to navigation, as the strong current of the river clears the waterway; but on either side of the channel a belt of the tangled weed, varying from twelve to twelve hundred yards in breadth, very often prevented the steamers from approaching the bank to tie up. The banks themselves depressed the explorers by their melancholy inhospitality. At times the river flowed past miles of long grey grass and swamp-land, inhabited and habitable only by hippopotami. At times a vast expanse of dreary mud flats stretched as far as the eye could see. At others the forest, dense with an impenetrable undergrowth of thorn-bushes, approached the water, and the active forms of monkeys and even of leopards darted among the trees. But the country--whether forest, mud-flat, or prairie--was always damp and feverish: a wet land steaming under a burning sun and humming with mosquitoes and all kinds of insect life. Onward and southward toiled the flotilla, splashing the brown water into foam and startling the strange creatures on the banks, until on the 18th of September they approached Fashoda. The gunboats waited, moored to the bank for some hours of the afternoon, to allow a message which had been sent by the Sirdar to the mysterious Europeans, to precede his arrival, and early in the morning of the 19th a small steel rowing-boat was observed coming down stream to meet the expedition. It contained a Senegalese sergeant and two men, with a letter from Major Marchand announcing the arrival of the French troops and their formal occupation of the Soudan. It, moreover, congratulated the Sirdar on his victory, and welcomed him to Fashoda in the name of France.