Konelis Larach, St. Cornelius of Zarant. 26th Abbot of Zarant; eminence grise to Dominic the Great; author of the Annalia: monk, scholar, saint and martyr.
Medieval Britons didn't write contracts. Instead, men making agreements would clap their knives onto an altar and recite the agreement three times to seal a deal. Even after the Normans introduced written contracts, British nobles would wrap the parchment around a knife to authenticate it.