They're in HD>Library>Fonts. I've even added the relevant font aliases to ID CS6's Fonts folder.
I'm referring to Adobe fonts. They appear after Zapfino in Font Book and in assorted Apple programs, and in strict alphabetical order (i.e. A for Adobe) in Word and FontExplorer.
In ID CS6 I've searched for Adobe Caslon under A, under C and among the esoteric font groups after Zapfino.
Any help would be most welcome!
On further checking I found I had duplicates. The active ones were in <user>/Library/Fonts and the inactive ones were in /System/Library/Fonts. I've reversed the actives/inactives and they now behave. I guess ID doesn't care for the <user>/Library/Fonts path.