The San Antonio Evening News, 12 October 1918, p. 6, "Just Among Ourselves": Mrs. Winchester Kelso, who has been with the volunteers, says she never in her life felt as if she was doing such real work.
Image · dated 12 October 1918 · source: The San Antonio Evening News, 12 October 1918 (page image via NewspaperArchive).

How it is shown: Complete page as supplied; no crop, no retouch, no search highlight.
Keep in mind: Confirmed as printed; her own words as reported by a columnist. The identification of "Mrs. Winchester Kelso" with May Joyce Kelso is Likely: the papers print no first name or Sr. here.