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Interior view of the caves of BETHARRAM, lower part, showing stalactites and stalagmites. Printed text at the bottom: 'THE PYRENEES 26. Caves of BETHARRAM, lower part, the Bourdon'. Reverse: French 15 centimes postmark, shipping stamp 'PARIS 15-26-28', handwritten address for 'Madame Bonnio, 5 square Delambre, Paris 14e'.