Your'e luckier than me, David
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If you noticed the small lettering in those leather cannon legends, the one below is in the Woolwich Artillery Museum. Don't forget to take a look at it, when you next flee from Kent and come to the city
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It also says in the legend that the center tube, equally made of leather, is circled with hemp cord, before being hemmed with leather.
This cord thing reminds me the cord wraped around the wooden canon in Malta ... meaning nothing but just that
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Fernando