Clara Elsene Peck (April 18, 1883-February 1968) was an early 20th century American illustrator and painter.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Clara_Elsene_Peck

Shake-speares Sweetheart by Sara Hawks Sterling / Illustrated by Clara Elsene Peck
1905 / Hard Cover / 282pp / Published by George W. Jacobs & Co., Philadelphia

Clara Elsene Peck on Wikimedia Commons: https://commons.wikimedia.org/wiki/Category:Clara_Elsene_Peck

Further reading:
https://mcad.edu/alumni-profile/clara-peck
https://www.antiqueillustrationart.com/clara-elsene-peck
https://www.dbdowd.com/illustration-history/2015/11/19/clara-elsene-peck