Thread:Prof. Draco/@comment-28082245-20160331222422/@comment-28082245-20160401015640

Okay, first three Maybes

Deng Shiru's seal - near impenetrable seal created M

The Original Domesday Book - Lists the names. Addresses and jobs of every person in England, updates itself M

Richard Lucian's pouch of Gunpowder - Destroys metal in seconds M

So how can I alter these for the Maybes to becomes Yes?