Mr. Brooke was detained by a message, but when he re-entered the library, he found Dorothea seated and already deep in one of the pamphlets which had some marginal manuscript of Mr. Casaubon’s,—taking it in as eagerly as she might have taken in the scent of a fresh bouquet after a dry, hot, dreary walk.
There are no more uses of "marginal" in the book.
Show samples from other sources
It’s never this loud when the Commandant is in attendance, and I relax marginally, glad to avoid her.
Sabaa Tahir -- An Ember in the Ashes
It was marginally less awkward when the game started again, if only because there was so much to mock.
Laurie Halse Anderson -- The Impossible Knife of Memory