Not too sure where this comes from, but it is a pontoon. I wonder if this is the sort of thing they might have used at Ferrybridge once Clifford's men had damaged the bridge? probably not, but they - Fitzwalter and so on - did call for coopers to repair it, I remember. Perhaps I am glad it was nothing like this since I have not written it that way and anyway... Hey! Hang on! Who is that in the rubber ring?