Just searched, there is a 1985 book on the Hump.

Going to order it although like I already said, Humphreys got plenty of coverage in the Russo book.

Another thing I recall from the book ( been a long time since I read it) was how much pressure he was always under from law enforcement. State and federal.

Didn't the stress end up causing ( multiple??) heart attacks?
Which killed him.
Think he was the first to die out of Accardo, Ricca and Roselli.
Not sure age difference of these guys .