Wikipedia:Articles for deletion/Richard McNeil Henderson
birth date not being found on Google does not have any relationship with notability.  It is not found just because it's long time ago and people were not aware of that. The article does have a fair amount of sources. Per SailingInABathTub, it passes 
— User:Sun8908, 10:46, 22 March 2021 (UTC)
Stance: keep
Cited policy: WP:ANYBIO (Wikipedia:Notability)