Adrian has been credited with some of the remarkable cave carvings found along the mainland shore opposite the island. At the opposite end of Fife, in the corner where Perthshire and Fife meet, we find a group of place-names reminding us of this unfortunate missionary. In dron parish is Exmagirdle (ecclesia Magirdle) with a ruined chapel. At Abernathy stand two large crosses, one of which is known as Mugdrum Cross, probably named after Adrian, and along the estuary of the Tay at Flisk a group of stones is called St. Muggin’s Seat. So if his traditions have any historical substance it is to north Fife as well as to the Isle of May that we should look for traces of his work.
G.A.F. Knight, Archaeological Light on the Early Christianising of Scotland, 1933