On 11 April 1898 American Joshua Slocum, on his famous and epic solo round the world voyage arrived at Jamestown. He departed on 20 April 1898 for the final leg of his circumnavigation having been extended hospitality from the governor, his Excellency Sir R A Standale, presented two lectures on his voyage and been invited to Longwood by the French Consular agent.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did Joshua Slocum depart from Jamestown to continue his trip?
20 April 1898