Moncur was a really interesting character. From what I read, Blue Note weren't too happy that he chose to keep his publishing. His tunes are amazing; like the Shorter brothers, he was from Newark (a few years younger) and seemed to have an interest in the fantastical, but kept things swinging in his own way. He had very significant substance problems and that presumably is part of why he was off the scene for long periods.
Love "Let 'Em Roll" by Big John Patton, and along with Larry Young, he's my favorite of the BN organists' stable.