Sur un mur de la poudrière de l’île de la Passe :
en.Wikipedia.org:
Ile de la Passe is a rocky islet in the bay off Grand Port on the island of Mauritius. Between 20-25 August 1810, during the British campaign to capture the island (then called Île de France) from the French, it was the scene of the Battle of Grand Port. This was a long and very hard-fought action between roughly equal forces of French and British frigates and, on balance, a defeat for the British, who lost four frigates, though one of these was subsequently recaptured, and the French squadron did not survive the British invasion of Mauritius.
Martian Spoken Here 