Under the first of the fallen autumn leaves, a couple of letters caught my eye. I kicked the leaves away and lying discarded on the pavement was a card, slightly bigger than a business card and laminated. It read:

WARNING! An irritant poison applied to banknotes could destabilize the western economy

I picked up the card and wiped some of the grime from its surface while musing that the word ‘banknotes’ should be replaced with ‘keyboards’. I pocketed this random treasure and headed on.