The Arden Shakespeare edition edited by Brean Hammond (2010) considers this play to be "a further redaction of an adaptation made in the Restoration of a collaborative play called 'The History of Cardenio' by Shakespeare and Fletcher." -- p. 96
Facsimile reprint of 1st ed., London: Printed by J. Watts, 1728.
Double falshood, 1728 by Theobald. ISBN 0719121388. Published by Cornmarket Press in 1970. Publication and catalogue information, links to buy online and reader comments.