All that can presently (June 2022) be gleaned about Jennie Castelle from sheet music covers and by Internet searching is that she was presumably an English music hall performer who has been featured on 2 works published between 1911 and 1919.
Surfers are welcome to contribute any further information about this performer.
The peformer is featured on 2 sheet music/recording covers. It does not claim to be complete and represents only the number of items located. Keys:(w&m)