All that can presently (March 2022) be gleaned about Cordelia Haager
from sheet music covers and by Internet searching is that
she was presumably an American singer who has been featured on just 2 works published between 1913 and 1916.
Her portrait on the left is taken from If a Bee Won't Behave in a Bee-Hive
(1913) music by Leo Edwards
, words by Arthur J. Lamb and published by Chas. K. Harris
, New York, USA.
Surfers are welcome to contribute any further information about this performer.