"Plaque with inscription commemorating the 50th Anniversary of the 1929 Gymanfa Ganu held in Niagara New York. That first Gymanfa spawned the National Gymanfa Ganu which is still held annually at different locations in the USA. Currently the event is a prime component of the North American Festival of Wales.
This is file number wnaa00395 in the Welsh Heritage Center Wymore, Neb. Archive"