"Will Witherby" probably refers to William Witherby. Josephine Witherby is William's sister. Their brother, Wesley W. Witherby, and his wife Zetta appear in images in this archive. Mertie West is the second wife of the photographer, H. H. West.
"Will Witherby" probably refers to William Witherby. Josephine Witherby is William's sister. Their brother, Wesley W. Witherby, and his wife Zetta appear in images in this archive.