Jack de Crow was (is?) a Mirror dinghy sailed and rowed by Sandy Mackinnon from Bristol to the Black Sea.  Sandy wrote about it in a book enjoyed by many LBTers who might also enjoy the conversation he had with Richard Fidler recently on the ABC available as a podcast: https://www.abc.net.au/radio/programs/conversations/sandy-mackinnon-rpt/12199356.  For those who have yet to catch up with all of this 'The Unlikely Voyage of Jack de Crow'  is a good read, even if, as a tale of daring do, it has been now be put in the shade by John Young's latest publication.