“Famille attablée sur la terrasse, ombragée par une bâche,” (family at a table on a terrace, shaded by a tarp) ca. 1890 – ca. 1910, by Eugène Trutat*, via Bibliothèque de Toulouse (cropped slightly by me).
*I was skeptical about the photographer because Trutat died in 1910, and the women on the left appear to be in the shorter dresses of the 1920s or 30s. However, they could be wearing the bathing suits of around 1900.