All that can presently (September 2022) be gleaned about
Kathryn Durkin from sheet music covers and by Internet searching is that she was presumably an American actress/singer who has been featured on just one work namely
Happy Tom O'Day (1915) words & music by
Byron Gay, and published by
W.A. Quincke, Los Angeles, California, USA
Her portrait on the left is taken from that same work.
Surfers are welcome to contribute any further information about this performer.