Asked to picture a nineteenth-century ship, you might think of the HMS Victory or HMS Temeraire, symbolic of empire. Something epitomised by flag-waving and victory - Britannia rules the waves. In this edition of Free Thinking, Catherine Fletcher asks if we memorialise one aspect of our maritime past at the expense of others.

Remember in Great Expectations when Magwitch escapes from a prison ship anchored by the coast? Dickens was likely inspired by the reality of the 19th century "prison hulks", decommissioned warships moored on docks to house criminals. Dr Anna McKay of the University of Liverpool can tell us more about how the hulks, supposed to be a short term solution to a crisis, ended up being used for decades. Dr Lloyd Belton of the University of Glasgow studies the Kru - fiercely independent West African sailors who formed an alliance with the Royal Navy to rid the African coast of slavers. His research follows what happened these men, who saw themselves as servants of the Empire, when they settled in Liverpool between the wars. And Dr Oliver Finnegan from the National Archive at Kew will tell us about the enorrmous historical potential of the "Prize Papers", a collection of thousands of unopened letters, legal papers and other documents from ships captured by British privateers and the Royal navy between 1652 and 1815.

Presented by: Catherine Fletcher

BBC Radio 3's Words and Music episode about Antartica, the explorer Sir Ernest Shackleton and his ship Endurance is available on BBC Sounds and you can find other episodes of Free Thinking exploring ships in history hearing from Sarah Caputo, Hew Locke and Jake Subryan Richards