Dear Mr Cornwell, I am currently working on research for a BA Honours History dissertation on British Military Intelligence (the collection and transmission of etc.) in the Peninsular War. In your novel Sharpe’s Gold you make reference to a telegraph system employing pig’s bladders to transmit messages across parts of Iberia. I have been struggling to find any history books explaining this method in more detail, are there any books or sources that you may have used in writing Sharpe’s Gold that you would be able to recommend regarding this telegraph system? Any guidance would be greatly appreciated, Regards, Duncan Ainslie