One farmer says to me, 'You cannot live on vegetable food solely, for it furnishes nothing to make bones with'; and so he religiously devotes a part of his day to supplying his system with the raw material of bones; walking all the while he talks behind his oxen, which, with vegetable-made bones, jerk him and his lumbering plough along in spite of every obstacle.

Henry David Thoreau, 1854. Where I Lived, and What I Lived For.

I think the proper name of the book is simply Walden.

"Walden" is a great book. I highly recommended it!