Bon d'après cet excellentissime site consacré aux références dans Providence, on est plus sur Robert Blake = Robert Bloch.
https://factsprovidence.wordpress.com/moore-lovecraft-comics-annotation-index/providence-1/
The byline on the typewriter page is “Robert Black.” According to an Alan Moore interview, Robert Black is the protagonist of the series, and a homosexual Jewish male. Robert Black appears to be based on a few characters (read Phil Smith comment) including Lovecraft’s fictional Robert Blake (who’s based the real writer Robert Bloch) and Lovecraft’s friend Samuel Loveman. (We’ll add more detail on this as Providence progresses and we get to know Black better.)
Mais hormi cette question tout est intéressant sur ce site.