Possible Clues:

• Hot milk curdled with ale
• Hot milk and ale
• Sweet spiced hot milk curdled with beer
• Sweet spiced milk curdled with alcohol
• Directions are in the mail for making a warming winter drink
• Milky drink second son fed to bard
• Might one drink enable him to work inversely around the ship?
• So step on curdled milk once used as a cold remedy
• An old-fashioned cold remedy some airmen prepare
• There's a drink for the poet all around the ship