Hi Jim,
Sadly I cannot help you in your quest, just wanted to chime in and say based on the Lelands lot you found, it would make sense that Harry had a world class collection! I would be shocked if someone here couldn't help to some extent. Good luck.
Howard
Actually just found this as well and seeing as Lelands auctioned at least 2 items from the collection - it may be worth a phone call to Josh
https://lelands.com/bids/1923-ty-cob...-psa-graded-10
Also found that Hunt auctions sold some items:
https://huntauctions.com/live/view_l...ast_number=800