Nobby's note

The infamous note carried by Corporal Nobbs to prove that he is a human being.

The note reads:

I, after hearing evidence from a number of experts, including Mrs Slipdry the midwife,
certify that the balance of probability is that the bearer of this document, C. W. St John Nobbs
is a human being.

- Signed, Lord Vetinari.

Of course, no one believes that it is real...