Jean de Joinville (1224-1317)
Erasmus (1466-1536)

“Peregrinatorium Religiosum – Manners and Customs on Shipboard – When the Priests and Clerks embarked, the Captain made them mount to the castle (round-top) of the ship, and chaunt psalms in praise of God, that he might be pleased to send them a prosperous voyage. They all with a loud voice sang the beautiful hymn of Veni Creator, from the beginning to the end, and while they were singing, the mariners set their sails in the name of God," [singing "Salve Regina,"] which was the Celeusma of the Middle Age. A Priest having said, that God and his mother would deliver them from all danger if processions were made three times on a Saturday, a procession round the mast was accordingly begun on that day.”
[British monachism, Fosbroke, 1817, p.441]


Conchy note: I'm having trouble getting at the Latin originals but... this is the first specific/exclusive mention of whatever a standard model heaving or hauling shanty might be. Compare/contrast the tone of the verbiage to Hugill on the Compostella 'peregrinatorium religiosum' of the same century (to follow.)