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View of the Porte de Calais in Boulogne-sur-Mer, an ancient fortified gate with a dome-topped tower, surrounded by trees. Printed text at the bottom: 'BOULOGNE-SUR-MER — Porte de Calais — B. L. 45'. Reverse: handwritten address to Madame Malingsard in Paris, a 5-centime postage stamp, and a Boulogne-sur-Mer postmark dated 1st June 1903.