The first clue can be found by eliminating another member of Order: The Vellum, simply kill one, and you will receive the clue.
The second you find in the Aelfgarstun farm, northwest of Lincoln in Lincolnscire, the name you look for it on the map so that it is not difficult to find.
The clue will be in a barrel inside a house that is to the south. Once you have both clues, you can find it at The Billhook in Lincoln, in the city near City Hall. His real identity is Havelok. After you've reviewed this guide on how to find the clues for The Billhook in Assassin's Creed Valhalla, it will be much easier for you to find this member of the Order of the Ancients.
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