I John Brown am now quite certain that the crimes of this guilty land will never be purged away, but with Blood.
Original passage & context
"I John Brown am now quite certain that the crimes of this guilty land will never be purged away, but with Blood."
The Dec 2 exception to the date window: his final words, written the morning of his execution. The manuscript carries heavier idiosyncratic punctuation ('this guilty, land: will never be purged away; but with Blood'); text as given at the cited page.
Read it in the original — PBS American Experience; original ms. Chicago History Museum ↗