"If at any time you are obliged to bring to on account of the ice, great circumspection should be used in the choice of a place to lie in; there are many places where the shore projecting to a point, throws off the cakes of ice towards the middle of the river, and forms a kind of harbour below. By bringing to in such a situation, and fixing your canoe above the boat, with one end strongly to the shore, and the other out in the stream sloping down the river, so as to drive out such masses of ice as would otherwise accumulate on the upper side of your boat, and tend to sink her and drive her from her moorings, you may lie with a tolerable degree of safety.--This is a much better method than that of felling a tree on the shore above, so as to fall partly into the river, for if in felling it, it does not adhere in some measure to the trunk, or rest sufficiently on the bank, the weight of accumulated ice will be apt to send it adrift, and bring it down, ice and all, on the boat, when no safety can be expected for it. The reflection here naturally occurs, how easy it would be, and how little it would cost, in different places on the river where boats are accustomed to land, to project a sort of pier into the river, which inclining down stream, would at all times insure a place of safety below it. The advantages accruing from such projection to the places where they might be made would be very considerable, bring them into repute as landing places, occasion many boats and passengers to stop there, who otherwise would not, and soon repay the trifling expense incurred by the erection. "The above observations are more particularly applicable to the Ohio; the following apply to the Mississippi, and point out the greatest impediments and the most imminent dangers attending the navigation of this heavy-watered and powerful river: "These are, 1st. The instability of the banks. 2. Planters, sawyers, and wooden islands.[46]