Norton had planned not to mention her theory that she had discussed with Mason but changed her mind.

They laughed at my idea of a new disease, and I didn't mention my choked-with-love theory.

But he didn't want to mention his theory to the Captain yet - not enough evidence.

"Did you mention his theory to anybody at the time?"

Was this a good time to mention his theory?

Newton also mentions Hooke's theory of colour, including his idea that it is a wave.

When I mentioned my theory to a friend recently, she was quick to point out its incompleteness.

"Has the doctor not yet mentioned his theory?"

Wapowski's letter mentions Copernicus' theory about the motions of the earth.

The Wapowski letter mentions Copernicus's theory about the motions of the earth.