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Interior view of the Grottes de la Balme (Isère), featuring a natural waterfall and a central water basin, surrounded by rock formations. On the reverse, a 5-centime French postage stamp, a postmark from Grenoble dated April 23, 1908, and a handwritten address to Madame Dulae in Epinay-sur-Orge. The publisher is listed as H. Bonhomme, concessionaire of the caves, with the note 'Fréd. Boissonnas, phot., Genève'.