Bump as to button-up shirt.
OK, so you meant Mr Lovelady not Mr Dougherty
That many people close together in the upper 6th floor around the hottest part of the day , their combined BTU generating a lot of additional heat, it’s understandable someone might take off their flannel shirt
An astute assessment & keen observation there, Mr. Ford. with your highlighting arrows. There's a strong resemblance there of Billy Lovelady, but as you pointed out void of the prominent bald spot. Any chance Billy Nolan Lovelady had any male siblings?
Doesn't the guy look very tall?