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Postcard showing an underground river in the Bétharram Caves, with three people in a boat. Printed text at the bottom: 'THE PYRENEES 5. Bétharram Caves — The River'. Reverse: 10 and 15 centime stamps, postmark from Lourdes dated 12.1.1927, address to Madame and Monsieur Labadens in Poitiers, and handwritten message 'Thank you for good reception'.