All that can presently (December 2022) be gleaned about Dolly Hackett
from sheet music covers and by Internet searching is that she was presumably an American vaudeville performer who has been featured on just one work namely Pretty Baby
(1916) music by Egbert A. van Alstyne
, words by Tony Jackson;Gus Kahn and published by Jerome H. Remick & Co.
, New York & Detroit, USA
Surfers are welcome to contribute any further information about this performer.