Both Uses

corollary
in
The Hunchback of Notre Dame
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But underlying this thought, the first and most simple one, no doubt, there was in our opinion another, newer one, a corollary of the first, less easy to perceive and more easy to contest, a view as philosophical and belonging no longer to the priest alone but to the savant and the artist.†
Chpt 1.5.2 *

corollary = something that follows from something else -- such as a logical consequence
He also occupied himself with annotating the fine work of Baudry-leRouge, Bishop of Noyon and Tournay, De Cupa Petrarum, which had given him a violent passion for architecture, an inclination which had replaced in his heart his passion for hermeticism, of which it was, moreover, only a natural corollary, since there is an intimate relation between hermeticism and masonry.†
Chpt 2.10.1

Definitions:

(1) (corollary)
something that follows from something else -- such as a logical or practical consequence
(2) (meaning too rare to warrant focus)