Bellario replies:

“Alas, my lord, your pulse keeps madman’s time!

So does your tongue.”[19:3]

That these tests were inadequate is proved by a simple illustration—in the “Comedy of Errors,”

Pinch the exorcist, mistakes Antipholus’ anger for madness. Luciana cries:

“Alas, how fiery and how sharp he looks!”

And a courtezan,

“Mark, how he trembles in his ecstasy!”[20:1]

Pinch attempts to feel the “madman’s” pulse, but in any case he knows that both man and master are possessed:

“I know it by their pale and deadly looks.”[20:2]