I don’t have one in my library 😏
This must be where I heard that concept (though I remembered the detail wrong): According to the book “The Films of Boris Karloff” (Bojarski and Beals, 1974): “During the writing of the Bride screenplay, the writers considered having Frankenstein’s wife murdered...
Is it a myth or truth that the original script called for Elizabeth’s heart to be used (unbeknownst to Henry) for the female creature? Hence, she really would have been “The Bride of Frankenstein.”