Antique Real Photo Postcard. Caption reads, "The Bore of the Petitcodiac River, Moncton, N.B." Published by Valentine-Black Company Ltd., Toronto. Divided back, unused. Condition: This is an original photo postcard, not a copy or reproduction. It is in very good condition. Comments: The Petitcodiac River, known informally as the Chocolate River, is a river in south-eastern New Brunswick, Canada. The Petitcodiac River tidal bores -- retrograde waves moving upstream over downstream waves -- occur twice a day and come from the world's highest tides in the Bay of Fundy. The first European mention of the bore was by British Lieutenant Colonel George Scott on 17 November 1758, during a downstream voyage from Moncton to Fort Frederick, near Saint John.