Secrets Worth Knowing is a 1798 comedy play by the British writer Thomas Morton.Nicoll p.142
The original Covent Garden cast included William Thomas Lewis as Rostrum, John Quick as Nicholas, Joseph George Holman as Egerton, Alexander Pope as Greville, Joseph Shepherd Munden as Undermine, John Fawcett as April, Thomas Knight as Plethora, Charles Farley as Valet, James Thompson as Cook and Isabella Mattocks as Sally.Hogan p.2036
References
Bibliography Nicoll, Allardyce. A History of English Drama 1660–1900: Volume III. Cambridge University Press, 2009. Hogan, C.B (ed.) The London Stage, 1660–1800: Volume V. Southern Illinois University Press, 1968.