Smell a rat.

Which he by hook or crook has gather'd And by his own inventions father'd.

I'll make the fur Fly 'bout the ears of the old cur.

Quoth Hudibras, I smell a rat; Ralpho, thou dost prevaricate.

For now the field is not far off Where we must give the world a proof Of deeds, not words.

He was in Logic, a great critic, Profoundly skill'd in Analytic; He could distinguish, and divide A hair 'twixt south and south-west side.