Notes and Queries, Number 82, May 24, 1851 / A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc.

The Third Act of Measure for Measure opens with Isabella's visit to her brother (Claudio) in the dungeon, where he lies under sentence of death. In accordance with Claudio's earnest entreaty, she has sued for mercy to Angelo, the sanctimonious deputy, and in the course of her allusion to the only terms upon which Angelo is willing to remit the sentence, she informs him that he must die, and then continues:
This outward-sainted deputy,—
Whose settled visage and deliberate word
Nips youth i' the head, and follies doth emmew,
As falcon doth the fowl,—is yet a devil;
His filth within being cast, he would appear
A pond as deep as hell.
Whereupon (according to the reading of the folio of 1623) Claudio, who is aware of Angelo's reputation for sanctity, exclaims in astonishment:
The prenzie Angelo?
To which Isabella replies (according to the reading of the same edition):
O, 'tis the cunning livery of hell,