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Postcard showing a man standing on rocks within natural rock formations, with openings in the background. Printed text at the bottom: '11. ST-QUAY-PORTRIEUX (C.-du-N.) The Caves of Isnin, the most curious of all the Region A. B.'. Back: handwritten address to Madame Lucienne Martzoff, 1 rue Clapier, Vaugrens (Seine), with a 40-centime blue stamp and cancellation.