In the Shakespearean Originals version Osborne gives this example from Twelfth Night of the use of "made" for our modern "mad:"
"In fact, in Act I, scene v, the Clowne likens a drunken man to 'a foole, and a madde man'...."
I am also basing this observation on my own experience of reading Shakespeare. The available concordances to Shakespeare's plays that I have seen consider only modern spellings of words.

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