All that can presently (January 2023) be gleaned about The Sisters Wynne from sheet music covers and by Internet searching is that they were presumably a music hall act who have been featured on just one work namely Three Little Chambermaids (1897) music by George Le Brunn, words by A. Hall and published by Francis, Day & Hunter, London W.C.2, England Their portrait on the left is taken from an Ogden's bromide cigarette card.
Surfers are welcome to contribute any further information about this performer.

This list is derived from information provided by Monologues.co.uk which went down sometime in 2023.
The loss of this valuable resource is very sad and a mystery.