author
d. 1816
A little-known early American William Walker appears in genealogical records rather than literary histories, making him more a historical name than a clearly documented author. The available sources point to a man born in 1743 in Dighton, Massachusetts, who died there in 1816.
The name William Walker is attached to many different historical figures, and for this entry the evidence is unusually thin. The clearest records I could confirm identify a William Walker born on December 14, 1743, in Dighton, Bristol County, Massachusetts, who died on March 20, 1816.
Those family-history records also describe him as the son of William Walker and Hannah Shaw, and say he had a large family with Elizabeth Reed. I could not confirm, from reliable literary or reference sources available here, that this William Walker was a published author, so it seems best to treat him as a historical figure whose connection to authorship is uncertain.
Because no trustworthy author-focused biography or portrait turned up in the sources I checked, some details remain unclear. If you have a book title or an alternate form of his name, that would make it much easier to identify the right William Walker with confidence.