All that can presently (August 2023) be gleaned about
Winnifred Greenwood from sheet music covers and by Internet searching is that she was presumably an American composer/actress/singer who has been featured on just one work namely
My Wigwam Queen (1903) music by
Henrietta B. Blanke, and published by
Whitney-Warner, Detroit, Michigan, USA
Her portrait on the left is taken from that same work.
She is also the one-off composer of
In Mississippi (1904) published by
Adelphi Pub. Co., Detroit, Michigan, USA.
Surfers are welcome to contribute information about this composer/performer.