The Man from Wagga Wagga

The scenario

In 1854, a young Englishman named Roger is traveling through South America. In Rio de Janeiro, he secures a berth aboard the Bella, bound for Jamaica, despite not having a passport. On April 20, the Bella sails. Four days later, a capsized boat bearing the name Bella is found off the Brazilian coast. Wreckage is recovered, but no people are found. The ship and everyone aboard are presumed lost. But rumors persist that some survivors may have been rescued by another vessel. Eleven years later, in Australia, a man comes forward claiming to be Roger.