Ten years later, she undertook one final singing tour of the United States; however, it turned out to be a critical, financial and personal failure, owing to the deterioration of her voice through age and wear and tear. From then on she restricted herself to the occasional concert here or there, or to private performances mounted at a little theatre she had built in her impressive residence, Craig-y-Nos Castle in Wales. She last sang in public on 24 October 1914, taking part in a Red Cross concert at London's Royal Albert Hall that had been organised to aid victims of World War I. She lived long enough to see the war end, dying in 1919 of natural causes.