To find out everything there is to know about the history of the Magdalen Islands, a visit this museum is heartily recommended.
To pierce the dense fog
Lighthouses are very useful but not in dense fog!
In 1870, the fortress of Rocher-aux-Oiseaux, located offshore of the Magdalen Islands, solved this problem by obtaining an English cannon dating from the 17th century. Its loud fire warned navigators of the presence of reefs.
Why was it replaced in 1907? Was it obsolete? Or was it because of the dark tales about this cannon that many thought was cursed…