I'm not sure what to make of this. I was searching about near the river where I find some interesting old things washing up after floods and I found a folded up sheet of lead. Being lead I put it in the bag for recycling rather than leave it there to pollute the river. It was only when I got it home that I realised it has odd marks all around it and as far as I can tell they're rat teeth marks. Whatever was wrapped up in the lead is long gone but that rat really wanted to get at it by the looks of it. What I thought was dumped building materials might have contained something someone wanted hidden in the river but considered tasty to rats