http://www.bbc.co.uk/iplayer/episode/p01n8jf6/Clydebuilt_The_Ships_That_Made_The_Commonwealth_Robert_E._Lee/ (http://www.bbc.co.uk/iplayer/episode/p01n8jf6/Clydebuilt_The_Ships_That_Made_The_Commonwealth_Robert_E._Lee/)
Available until April 28th for those of us in the UK. Waverley features a lot in the absence of any footage of period ships.
I noticed that P. N. Thomas' database says Giraffe was "Purchased U. S. 62, r/n Robert E. Lee." U.S. ?
All the best
Brian Gates