NO79NW 9 c.7103 9569. A large collection of Mesolithic flint, schistose grit and quartz artifacts collected by Miss H M L Paterson between 1906 and 1941 is now preserved in the National Museum of Antiquities of Scotland (NMAS). The collection is mainly the result of the gleaning of ploughed fields on two terraces of the River Dee (approximately on the 200ft contour line) between the confluence of that river with the Water of Feugh (7095) and two miles downstream to Knappach (7395) - including the grounds of Beltcraigs, Birkwood, Mayfield and Knappach but is also derived from an excavation at NO 7103 9569 by Miss Paterson, Lacaille, and Dr. Graham Callendar in 1935. The collection, which includes flakes, blades, scrapers, micro-burins and cores, is also rich in microliths some of which have been made by micro-burin technique. A D Laicaille 1954; H M L Paterson and A D Lacaille 1936; Proc Soc Antiq Scot 1951. In 1935 trenching 450m SW of Birkwood farmhouse revealed part of a Mesolithic settlement; artifacts of flint, schistose grit and quartz (some of them burnt) were found with charcoal at depths of between 0.6m and 1m. The finds are preserved in the National Museum of Antiquities of Scotland. H M L Paterson and A D Lacaille 1936; A D Lacaille 1954; RCAHMS 1984