Thursday, 7th. The Illinois is called by the Osages _Eng-wah-condah_, or _Medicine Stone Creek_. At our fording place near the Saline, it is about sixty yards wide, with clear water and pebbly shores, like those of the Neosho. We proceeded on, through a country wooded with small oaks, and interspersed with occasional small prairies, and crossed a deep ravine called Bayou Viande.[135] The Bayous, as they are named in this country, unlike those of the lower portion of the Mississippi river, are large and often very profound ravines or watercourses, which, during the spring season, or after heavy rains, receive the water from the surface of the prairies, and convey it to the river; but in the summer and early autumn, the sources being exhausted, the water subsides in their channels, occupying only the deeper parts of their bed, in the form of stagnant pools, exhaling miasmata to the atmosphere, and rendering their vicinity prejudicial to health. The extreme temperature of the day was 93 degrees, but it was rather abruptly reduced by a strong wind from the S. E., which brought up a heavy rain, with much thunder and lightning, and continued to drench us until the evening, when, after a ride of fourteen miles, we encamped at Bayou Salaison or Meat-salting Bayou.[136] At our mid-day refectory, we were much annoyed by great numbers of small ticks, that were excessively abundant amongst the grass, and crawled by dozens up our leggings. Wherever they effected a lodgement upon the skin, their numerous punctures would cause an intolerable itching sensation, that bid defiance to repose. In the evening, in addition to the needful process of drying our {121} clothing and blankets, we had ample employment in scratching and picking the pestiferous arachnides from our bodies. On entering the water, the disagreeable sensation seemed to be mitigated for a time, only to be augmented on our return to the atmosphere. Mosquitoes, which were also abundant, were readily expelled from our tents by the smoke of burning wood; but the ticks, otherwise constituted, frustrated our endeavours to obtain the necessary rest and sleep during the night. These ticks are of two different species, and, in common with other species inhabiting different parts of the United States, are distinguished by the name of _seed ticks_, probably on account of their small size when compared with others of the same genus. The larger of the two kinds[137] may be compared, in point of transverse diameter, to the head of a small-sized pin; but the other one is so much smaller, as to elude the sight, except on minute inspection. The Cherokee Indians frequently visit this vicinity on hunting excursions; and our guide informs us, that a hunting-party of that nation is at present situate at the mouth of this Bayou, at the distance of two miles and a half from our camp.