who knows what

Thankfully, his assistant knows these roads like the back of his hand.

That she had her definite reason he knew, as a woman knows when another woman is wearing a last year's gown.

Old Pit Town knows lots of good people, and would give us letters, I suppose.

Perhaps Mademoiselle Zizine, of the French theatre, was the reason—who knows?

The single employer rightly knows that there is a wage higher than he can pay and hours shorter than he can grant.

He, who knows the dangers and necessities we were in, will appreciate the joy we felt and that we feel at its arrival.