On 28 March 1772, the French navigator Louis Aleno de St Aloüarn landed on Dirk Hartog Island "and became the first European to claim possession of Western Australia".
[2]: 9 [3] Members of Mengaud's ceremonial team raised the royal flag on the island and buried a bottle containing a document stating what had occurred, alongside two silver écu coins, worth six Livres tournois (Francs).
[3] This occurred in sight of Cape Inscription, where in 1696 the Dutch mariner Willem de Vlamingh had also left a commemorative plate recording his visit and that of Dirk Hartog in 1616.
[citation needed] In 1998, a lead bottle cap with a shield coin set into it was discovered at Turtle Bay by a team led by Philippe Godard and Max Cramer.
[citation needed] On 1 April 1998, an intact bottle bearing a lead cap identical to the one found earlier, also with an écu coin in it, was unearthed.