strings: Respecting this view, I think I may say, without the fear of being contradicted, that its navigation may be rendered completely practicable as high as the mouth of the South Fork, or probably higher, to vessels of from twenty-five to thirty tons burden, for at least one half of all common years, and to vessels of much greater burden a part of the time. From my peculiar circumstances, it is probable that for the last twelve months I have given as particular attention to the stage of the water in this river as any other person in the country. In the month of March, 1831, in company with others, I commenced the building of a flatboat on the Sangamon, and finished and took her out in the course of the spring. Since that time I have been concerned in the mill at New Salem. These circumstances are suffcient evidence that I have not been very inattentive to the stages of the water. The time at which we crossed the mill-dam being in the last days of April, the water was lower than it had been since the breaking of winter in February, or than it was for several weeks after. The principal diffculties we encountered in descending the river were from the drifted timber, which obstructions all know are not diffcult to be removed. Knowing almost precisely the height of water at that time, I believe I am safe in saying that it has as often been higher as lower since.