Was Hamlet mad? What about his statement:
I am mad but north-northwest. When the wind is southerly, I can tell a hawk from an handsaw.?
The imagery is striking to the modern ear. A hawk is a bird. A handsaw is a carpenter's tool...
But "handsaw" could be a corruption of "hernser" or "hernshaw," meaning "heron," another type of bird. To complicate matters, a "hawk" is a plasterer's tool, a small hand-held board that plasterers use to carry mortar/plaster that they apply using a hand trowel. So the image becomes less striking, essentially that Hamlet can tell one tool from another, as opposed to discerning the difference between a bird and a tool...
Or the image could work on the basis of Hamlet's being able to discern the difference between types of birds...
In any case, it clearly means that Hamlet is not really crazy, except when the wind is blowing in a certain direction.;)

