Both Uses

conceive
in
The Phantom of the Opera
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When I began to ransack the archives of the National Academy of Music I was at once struck by the surprising coincidences between the phenomena ascribed to the "ghost" and the most extraordinary and fantastic tragedy that ever excited the Paris upper classes; and I soon conceived the idea that this tragedy might reasonably be explained by the phenomena in question.†
Chpt Prol. *
From being the most honest building conceivable, he soon turned it into a house of the very devil, where you could not utter a word but it was overheard or repeated by an echo.†
Chpt 21 *

Definitions:

(1) (conceive as in: conceive the idea)
to originate, understand, or imagine
(2) (conceive as in: conceived their first child)
become pregnant or fertilize an egg
(3) (meaning too rare to warrant focus)