"Massinger largely assisted him [Fletcher] in this play, but the third act appears to be by some unknown author"; cf. DNB. "As it was diverse times acted at the Blacke-Friers by the Kings Majesties servants."
Microopaque. New York : Readex Microprint, 1954. 1 microopaque ; 23 x 15 cm. (Three centuries of drama. English, 1642-1700) (Three centuries of English and American plays, 1500-1830)