"The items in Abraham Lincoln's pockets the night of the assassination were as follows: a pocketknife, a linen handkerchief, a sleeve button, a fancy watch fob, two pairs of spectacles, a lens polisher, a tiny pencil, tiny fragments of hard red and green candy, a fine brownish powder which appeared to be snuff, and a brown leather wallet (one section was engraved "U.S. Currency" and another section was engraved "Notes"). The wallet contained a Confederate five dollar bill, and nine old newspaper clippings. Included among these clippings were two articles of praise and five others dealing with the issues that were on Lincoln's mind during his final months."
This quote is from this website, but the information is available from news stories, etc.
It is interesting to think of Lincoln, under all the stress of the Presidency and the Civil War, stopping to take a pinch of snuff.