Finally , he recounts the exciting story of the Grosvenor , an English bound Mercantile ship that ran aground on 4 August 1782 in South Africa - and of the 125 who made it on shore - only 13 survived the trip back to civilization .
Finally , he recounts the exciting story of the '' Grosvenor '' , an English - bound Mercantile ship that ran aground on 4 August 1782 in South Africa . 
 Of the 125 who made it to shore , only 13 survived the trip back to civilization .