On the duty of civil disobedience (101 KB PDF) by Henry David Thoreau (1817-1862)
(Here's the source LaTeX file).
I made this because I was not satisfied by the typesetting of the various editions I found on the web. I have also made a handful of minor punctuation corrections, which may be different from the original.
Thomas L. Knapp has written a nice introduction to Thoreau's text.