The ‘Gros Ventre’ (aka Big Belly) was the name of the ship that Vice-Admiral Rosily sailed upon as he passed the Margaret River wine region 195 years before it was established. On this voyage Rosily made the first recorded map of Flinders Bay, which marks the southwestern corner of the Margaret River wine region. The expedition then sailed north to Shark Bay, where Rosily made another accurate chart of that section of the coast. This map showed the location on Dirk Hartog Island where French silver coins were buried, along with two sealed bottles containing a document claiming possession of the land on behalf of France. Rosily's map was used more than 200 years later to help locate the bottle and coins.