Ordnance Survey National Grid sheets 6 inch to 1 mile marked to show field boundaries by donor for thesis 'The Field Boundaries of Huntingdonshire' (1970) National Grid sheets TL19:NW, NE, SW, SE, TL25: NW, NE, SW, SE, TL26: NW, NE, SW, SE, TL27: NE, SW(2), SE, TL28:NW, NE, SW, SE, TL29:NW, SW, SE, TL36: NW, TL37:NW, NE, SW, SE, TL38:NW, NE, SW, SE, TL39:SW marked to show whether field boundaries are continuous hedge, discontinuous hedge, ditch, line of trees, wood post and wire fence, concrete or metal post and wire fence, grass baulk, stone wall, embankment, boundary removed and water. 1966-1969