Manor House, Irby in the Marsh, is a 19th century farmstead and placename evidence for a manor. {1} Manor House, Irby in the Marsh. Partially extant 19th century farmstead. Parallel. The farmhouse is detached from the main working complex. There has been a partial loss (less than 50%) of traditional buildings. Isolated location. Large modern sheds are located on the site. {2}