Close to my den the last two or three days—pretty dull every thing—alone nearly all the time—very moderate temperature (but cold probably by the time you get this)—I guess matters physiological are as well with me as could be expected considering—when exhilarated with visitors or friends here I probably feel & throw out sort o' extra (wh' probably acc'ts for Horace's glowing picture probably having a very flimsy background or none at all)—the main things are a pretty good (born) heart & stalwart genesis—constitution—these the main factors—Keeping hearty—Y'r letters always welcomed—
Walt Whitman