I read your excellent book on Waterloo in connection with the 200th Anniversary of the battle. Towards the very end you state the moniker “Iron Duke” came from the iron window covers on Apsley House about 1832. A history buff friend of mine tells me that is a myth as Wellesley was called the “Iron Duke” earlier than the window stoning incidents. It was for his politics rather than battle field persona as you claim.
What is your source on the windows incident? Are you aware of earlier uses of that label?
AD..