On 2 August that year the dauphin Francis played at a jeu de paume court "prés d'Ainay" and, getting overheated, drank a glass of iced water which proved fatal (he died a few days later at Tournon, aged 18).
Lwoff was born in Ainay-le-Château, Allier, in Auvergne, France, the son of Marie (Siminovitch), an artist, and Solomon Lwoff, a psychiatrist.
After playing a round of tennis at a jeu de paume court "prés d'Ainay", the Dauphin asked for a cup of water, which was brought to him by his secretary, Count Montecuccoli.