Long before Darwin's theory of evolution, Buffon had surmised that species evolved very slowly under different material circumstances.

Those are the main facts of the case, stripped of all surmise, and stated as baldly as possible.

The tragedy has been so uncommon, so complete and of such personal importance to so many people, that we are suffering from a plethora of surmise, conjecture, and hypothesis.

What do you think of my theory?" "It is all surmise."

My mind had been too much excited by all that had occurred, and the strangest fancies and surmises crowded into it. Every time that I closed my eyes I saw before me the distorted baboon-like countenance of the murdered man.