According to the Internet source given below, Alfred William "Bob" Roberts was a British folk singer, songwriter, storyteller, bargeman, author, and journalist. He was also the last captain of a British commercial vessel operating under sail.
Born in Hampreston, Dorset he attended Wimborne Grammar School on a choral scholarship. Working initially as a journalist he spent the next 35 years at sea as bargeman both as a mate and skipper.
He appeared in folk clubs and festivals From the 1950s onwards, recording 2 of his own albums and provided track on others, As an author Roberts wrote five books about seafaring.
||Bob Roberts (folksinger)
||Biography by wikipedia.org.