I refer, of course, to man's mastery over the latent forces of Nature.
To Alec Haskell I shall in this discourse again have occasion to refer.
Cyrus worries so about it (of course we know what you refer to).
At the end of it, he asked, "Did you--you must excuse me--refer to me at all?"
Those who desire information of the most undoubted, must refer to his pages.
We shall ...