Deletion of Charles Haigh-Wood

Comment: There is discussion of Haigh-Wood's paintings. E.g. http://www.americanreadingforum.org/yearbook/yearbooks/02_yearbook/pdf/06_Dowhower_final.pdf For the Royal Academy exhibitions, from  "The person's work (or works) either (a) has become a significant monument, (b) has been a substantial part of a significant exhibition, (c) has won significant critical attention, or (d) is represented within the permanent collections of several notable galleries or museums." I've not been able to find out whether these exhibitions featured Haigh-Wood's works as a significant part, or whether his pictures were one out of many. I've also been unable to find if significant art galleries hold works by Haigh-Wood. It appears that the UK national gallery and portrait gallery do not, unless my search-fu has failed. However, as this appears to be a case where more in-depth research is necessary to characterise his notability, I suggest that the article remains until someone can put in the necessary work
Stance: keep
Cited policy: Wikipedia:Notability (WP:ARTIST)