As deep as any time , this year.

March 7. 

P. M. - Measured snow on account of snow which fell 2d and 4th. West of railroad, 16+; east of railroad, 16; average, say 16+; Trillium Wood, 21. 

Probably quite as deep as any time before, this year. 

There are still two or more inches of ice next the ground in open land. I may say that there has not been less than sixteen inches of snow on a level in open land since January 13th. 

My stick entered the earth in some cases in the wood, as it has not done before. There has been some thawing under the snow.

H. D. Thoreau, Journal, March 7, 1856

There has not been less than sixteen inches of snow on a level in open land since January 13th. See March 9, 1856 ("sixteen inches of snow on a level in open fields, hard and dry, ice in Flint’s Pond two feet thick, and the aspect of the earth is that of the middle of January in a severe winter."); March 19, 1856 ("This depth it must have preserved, owing to the remarkably cold weather . . . So it chances that the snow was constantly sixteen inches deep, at least, on a level in open land, from January 13th to March 13th")