Medieval watercourse known as Monks' Dyke. It was dug to supply water from Aswell and St Helen's springs to Louth Park Abbey (see PRN's 42925, 42924 and 43579 respectively). The ditch is maintained as a modern drain, extending beyond Louth Park Abbey. {1}{2}{3}{4} The route from the Louth/Keddington parish boundary to Louth Park Abbey survives clearly as earthworks, as seen on aerial photographs examined as part of the National Mapping Programme. It is not known how much of this route is medieval or modern in origin, however. {5}