 The second bombe, named ""Agnus dei"", later shortened to "Agnes", or "Aggie", was equipped with an important additional feature, the "diagonal board" that had been designed by Gordon Welchman.It was installed on 8 August 1940; "Victory" was later returned to Letchworth to have a diagonal board fitted.During 1940, 178 messages were broken on the two machines, nearly all successfully.