(cheers Dave)   Another question regarding the driver or spanker boom which is not indicated in the Woolwich yard draught of 1771: (see edit below)    http://collections.rmg.co.uk/collections/objects/86385.html   However the driver boom washed overboard according to Cook's log entry of 16 Feb 1769  The driver/spanker boom is clearly evident in Samuel Atkins water colour of Endeavour off the coast of New Holland possibly painted in 1794.   http://nla