File:Althea Gyles, c. 1902.JPG

Summary
From https://whollybooks.wordpress.com/2015/11/05/althea-gyles/

Detail of a photograph of Althea Gyles (1868–1949) and Constance Markievicz (1868–1927)

Fair use rationale:

By an unknown photographer, but the photograph is used without attribution on several web sites. Uploaded here to identify the subject of the article Althea Gyles. Fair use as: (1) This is a low resolution image using only the part of the photograph needed (2) There is no other known likeness of Althea Gyles (3) For use only on the page Althea Gyles.