Deletion of Valentine Marshall

Comment: passes  since he's discussed in https://www.google.com/search?tbm=bks&hl=en&q=%22Valentine+Marshall%22+%22Nottingham%22 several different reliable sources, including at least one historical journal that covers Australian studies, and his life continues to be explored in historical exhibitions, as other editors have noted.   I've added some references to the article
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG)