I will be in London with a few hours to kill on Friday. Usually, I would go to the PRO at Kew and do some Waterloo research there but on Friday I'll be right next to the British Library in St Pancras. I've never been there to do any research before - my understanding is that, in terms of 1815, it has the Siborne letters which would be interesting to look at. However, I believe these have all been copied up and published now (and I've read all of them countless times).

Could anybody recommend anything else held by the Library which might be of interest?

Many thanks

Martin