Wellington's Code/Cipher during the Peninsular War

Some months ago, I wrote about a British book cipher during the American Revolutionary War. This time, I uploaded a new article about Wellington's dictionary code: "Wellington's Polyalphabetic Cipher with a Dictionary Code". For words/names not found in the dictionary, a polyalphabetic cipher with heavy nulls was used.

My observations are based on Wellington's despatch to General Maitland dated 2 September 1812. I thank George Lasry for the information of the auction of the letter at Spink.