“The village of Adel is termed Adhill in the Liber Regis, which probably gives the true etymology, The Hill of Ada, the first Saxon colonist of the place.
On the slope of the hill, a little north of the village, are the remains of a Roman camp, where a number of ancient monuments, three altars (one inscribed “To the Goddess Brigantia”), several urns, statues, coins &c have been found.”
The Annals of Yorkshire
John Mayhall
1874