The market opened in the spring with flattering prospects. Buyers from a number of important points in the Eastern States, previously deriving their supplies from Maine, visited our State, anxious to secure contracts for choice lumber, and the opinion prevailed that the demand would exceed the supply. The prospect encouraged manufacturers to make unwonted exertions in turning out all the stock that could be rendered available, which involved increased expense. In some places, as was the case at Saginaw, a very large amount was got out in the early part of the summer. About the close of June, the market experienced a sudden and unlooked-for depression, after which prices tended speedily downward, falling to such a low point before the close of the season that manufacturers on the west coast generally suspended their shipments. Those on the east coast continued to ship, but their shipments to a very great extent still remain unsold. We are cognizant of 7,000,000 feet held in that way by only four manufacturers. The accounts this winter are very favorable, but the idea that obtains, fixing the amount at a very high figure, is vague and erroneous. The true state of the case is, that manufactures, as a general thing, in view of the depressed condition of the trade, have been making calculations to do a light business, and got out their logs sooner than they expected, and will on the whole do rather more than they had anticipated, having gone into the woods lighthanded. The most experienced judges concur in fixing the amount of logs got out this winter on River St. Clair, at Port Huron and Saginaw Bay, but not including the rivers above, at 175,000,000 feet. In the Saginaws, it is ascertained that about 100,000,000 will be got out. Taking the entire east coast, it is thought the logs this winter would exceed those of last by fifteen to twenty per cent. By Custom House statements of shipments, added to actual receipts at one of the receiving points--Chicago--it will be seen below that for 1859 a little over 269,000,000 feet is the amount of shipments arrived at. These figures, taken in connection with the estimates of those competent to judge, render it certain that the actual amount shipped out of the State did not vary materially from 400,000,000 feet. There being no penalty involved in the failure of masters of vessels to report, there is great carelessness in the matter. The Cleveland, Toledo and Sandusky shipments, are at the outside, not more than half reported. Those reported to Buffalo, Oswego, etc., are a little nearer the truth, but they fall considerably below the mark.