Green’s Dictionary of Slang

isle of France n.

a dance.

1859, 1860		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.
1909		J. Ware Passing Eng. of the Victorian Era 10/2: You capture the first liker at him in a snug artful fox at some chantin ken where there’s a bona varderin serio comic, and Isle of Francer engaged. – From Biography of the Staff Bundle Courier, the gentleman who accompanies ‘seriocomics’ from music-hall to music-hall when ‘doing turns’.