abscondite

"The world has hitherto so little troubled its head with the points of doctrine held by a community which contributes in other ways so largely to its amusement, that, before the late mischance of a celebrated tragic actor, it scarce condescended to look into the practice of any individual player, much less to inquire into the hidden and abscondite springs of his actions.

The Atlantic Monthly, Volume 11, No. 67, May, 1863 Various