- used to describe a deep pool in a river or on the sea-bed, this term is found in a number of local names that rarely appear on official maps. George Watson's Roxburghshire Word-Book (1923) mentions Jack's Plum and Pate's Plum, which may have been associated with local fishermen. An 1877 poem by William McHutchison, tells of fishing in 'Bailie's Plum' and a late eighteenth-century work entitled Glasgow Past and Present describes:
places in this part of the Clyde which went by the name of plumbs or holes, where several accidents have occurred.