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Reputedly, the Fort Commandant ordered a deep mining shaft to be dug under the Fort with stairs and a tunnel dug under the submerged sea floor directly in a straight line from the fort to the small island offshore, for many years of work, and then up to an exit there. It may have collapsed or flooded. Or does it exist? 2605:6000:101C:8964:50E:B12F:13E7:45DD ( talk) 22:19, 6 April 2020 (UTC) reply