Letter, introducing accompanying paper on shipbuilding from John Barrow to Sir Joseph Banks Letter introducing a paper by Sir Robert Seppings titled 'On a new principle of constructing ships in the mercantile navy'. Sent from John Barrow at the Admiralty to Sir Joseph Banks. Seppings' paper is found at PT/14/11. Subject: Engineering This letter was not published in Philosophical Transactions. 1 February 1820