Deletion of Michael Kempson

Comment: His own work (not just work he printed for other artists) is in the collection of the National Gallery of Art, Australia|National Gallery of Art https://searchthecollection.nga.gov.au/object?uniqueId=172736 - their collection search is buggy, I found this thru Google. That combined with the Art Gallery of New South Wales collection https://www.artgallery.nsw.gov.au/collection/works/?q=Michael+Kempson means he passes  with verifiable work held in several notable museum collections. The article needs an overhaul and would benefit by trimming excessive detail and unsourced/poorly material, but it should be kept
Stance: keep
Cited policy: Wikipedia:Notability (WP:NARTIST)