I met Frank several times. He was a pleasant fellow and appeared at first blush to be normal; however, if you spend more than an hour with him, there were manifestations of what villagers (in days of yore) used to call "odd behavior." Frank probably spent way too much time in a very rarefied, circumspect "inner world." Nevertheless, I liked him.
Ed Marlo also liked Frank (in short doses) and was very friendly and helpful to him, showing him lots of stuff. Frank then "adapted" and "adopted" much of this material.
He once lectured in New Orleans many years ago. During the initial 15 minutes he performed about 10 card tricks in a row... One of the magicians in the audience (who was famous for his undiplomatic outbursts) then stood and blurted: "You know, you've done about a hundred *#$*@! card tricks and you haven't explained a #*&@! thing!" This guy then left the lecture room, slamming the door.
Frank merely shrugged, did another card trick, and then closed with the floating cube. He did, by the way, eventually explain all of the tricks.
Frank, like J. Stewart Smith, was quite a character.
I miss these guys...