I uploaded a new article "Specimens from Papers of Francis Willes".
Of the motley of materials presented, the most interesting to me is a set of four codes in English (1792). The instructions prescribe that the codes could be switched even in one letter. Such code switching is what I observed in French diplomatic correspondence about that time ("Code Switching in French Diplomatic Correspondence and Intercepted Letter of Barbé-Marbois (1782)").
