All that can presently (December 2022) be gleaned about Brownie Carroll 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 Come Josephine in My Flying Machine (1910) music by Fred Fisher, words by Alfred Bryan and published by Maurice Shapiro Music Publisher, New York, USA
Her portrait on the left is taken from that same work.
Surfers are welcome to contribute any further information about this performer.