The Wild Boar story
"The 'traditional origin' of this custom is as follows; a wild boar had taken possession of a wood not far from this college,
and by his nocturnal depredations had become the terror of the neighbourhood. One day a student of this society, having wandered
into the forest with the 'Logic of Aristotle' in his hand, suddenly perceived the furious animal approaching him. Not at all alarmed,
he awaited his attack with great 'logical' composure, and, when in the act of springing on him, he thrust the Aristotle into the
boar's throat, crying *gracca cum est, and instantly choaked him."
Oxford University and City Guide, 1820, page 21
* A rough translation is "with the compliments of the Greeks"