Shishkin, or what?

[Slik1989]

Hello Here is a picture. Fine paintings "Tree Felling" Shishkin.
1. The author is not known, is 3 letters SCH and the year 1861.
2. Written on the canvas, I think - oil.
3. Size 55 * 35
4. At the expense of the signature above.
No more disk imaging, pictures have turned out a bit bad, but if you need perefotkayu better.
Tell us your opinion about it, respected experts.