"Fare Thee Well" is an 1816 poem by George Gordon Byron, 6th Baron Byron, known as Lord Byron.
Lord Byron married and fathered a child with Annabella Milbanke in 1815, but they separated in 1816. In March of that year, Byron composed "Fare Thee Well" and enclosed a note that said, "Dearest Bell --- I send you the first verses that ever I attempted to write upon you, and perhaps the last that I may ever write at all."
In April he signed a Deed of Separation and added the following notation . . .
Byron left England and never saw his wife or daughter again.