E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Faces.
To keep two faces under one hood. To be double-faced; to pretend to be very religious, and yet live an evil life.
1
We never troubled the Church We knew we were doing what we ought not to do, and scorned to look pious, and keep two faces under one hood.Boldrewood: Robbery Under Arms, chap. ii.