48Sheehan, Jeramiah et.al. Beneath the Shadow of Uisneach: Ballymore & Boher, Co., Westmeath: Ballymore-Boher History Project, 1996.
Although most sources date the photograph to 1926, this book suggests the rally at the Catstone was a 1927 event. The book also identifies the figure standing to the right of Éamon de Valera as Patrick McKenna (1880-1929), a Fianna Fáil Westmeath TD (member of the Irish legislature.).