A cache to extend the Lockdown Tree walks series and make it a more circular route.
I can't find any information about the name 'Wernbrook' but here are some interesting facts about 'Noctorum' itself where this cache is.
The name Noctorum is of Old Irish origin, originally Cnocc Tirim, meaning 'Dry Hill'. This may be in reference to Bidston Hill, of which Noctorum is situated on its western slope. The name may long pre-date the Norse-Irish settlement in the early 10th century and go back to a Hibernian settlement of the west coast in the Sub-Roman period (early 5th century)
Noctorum appears as Chenoterie (Norman French) in the Doomsday Book 1086. "Chêne" (French for oak) may be used here as in the Wirral hamlet of Landican (Old Welsh/Brythonic) called Landechene, the Oak Enclosure in the Norman French of the Doomsday Book.