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Interior view of the Betharram Caves, showing an artificial canal reminiscent of Venice, with a group of visitors on a platform. Printed text at the bottom: 'THE BETHARRAM CAVES. — The Venice Canal. — LL'. Reverse: handwritten correspondence dated July 10, 1915, addressed to Madame Amblot in Angers, with a Betharram postmark and a Lestelle cancellation.