All that can presently (June 2022) be gleaned about Mina Brae from sheet music covers and by Internet searching is that she was presumably an English music hall singer who has been featured on just one work namely Has Anyone Seen a German Band? (1907) music by Bennett Scott, words by A.J. Mills and published by Star Music Co, Eldred, Pennsylvania, USA
Surfers are welcome to contribute any further information about this performer.