De Winton & Co; CHALONER locomotive 16/15
Deacon, William, of Long Buckby, Nhants 13/18
Dean and Chapter Quarries, Northampton 14/9; 16/1A
Deane, Nhants; watermill 12/21, 25
Deanshanger, Nhants; brickworks 13/14
Deddington, Oxon
  Margretts brewery 15/4
  mill 9/9; 11/14
Deene, Nhants; brickworks 13/11, 13
Delapre Abbey, Nhants 12/31
Delapre Estates, Nhants 14/8, 9
Denbigh & Co, brewers of Northampton 14/16, 19, 26
Denbigh Hall, Bucks 2/4
Denford, Nhants
  brickworks 13/14
  limekiln 13/14
  watermill 12/21, 25
Dent, Thomas, of Town Mill, Northampton 12/32
Dent, William, miller of Weston Favell, Nhants 12/37
Denton, Benjamin; boot and shoe manufacture of Rushden, Nhants 12/40
Denton, Nhants; dovecote 9/12
Desborough, Nhants
  brickworks 13/14
  ironworks tram- and railways 3/4; 13/14
  watermill 12/21, 25
  windmill 12/13, 14
Desborough Industrial & Provident Co-operative Society Ltd 13/14
Dexter, William, miller of Easton-on-the-Hill, Nhants 12/26
Dickens, P., of Poplars Farm, Rothersthorpe; steam engine collection 6/9
Dickens family, millers of Ditchford, Nhants 12/25
Dickenson, J.E., Leather Merchants, of Wellingborough 10/17-18
Dicking Bros, tanners of Northampton 15/13
diesel engine, Lister, Works no. 31 11/14
diggers, mechanical
  Corby quarries' pioneering use 11/30-1
  Ruston-Bucyrus petrol motor 10/11
distance post, cast iron, Grand Junction Canal 6/7
distillery, sugar beet; Buscot Park, Oxon 6/2-3; 7/2
distribution systems, medieval 15/12
Ditchford, Nhants; watermill 12/21, 25
Dix, Frank 10/17
  'Hardingstone Iron Quarries' 14/7-10
Dix, George, brickmaker of Blisworth, Nhants 13/12
Dix, R.F., of Kettering 7/14
Dockwell Mill, Nhants 7/6; 12/21, 25
documentary evidence, use of 15/11
  study of Fawler, Oxon 16/8, 9-10, 11, 12
Doddington, Nhants see Hardwater Mill
Dodford, Nhants
  brewery 14/13, 17
  watermill 12/21, 25
Dodson, W., miller of Woodford, Nhants 12/38
Dollay, David, brewer of Wellingborough, Nhants 14/26
Domesday survey
  on ironworking, Nhants 11/17; 12/10
  on mills: Nhants 12/19-38 passim; Tingewick, Bucks 11/13
Donald, Robert, brickworks manager of Wellingborough, Nhants 13/26
'donkey' engine, Manco 13/23
donkeywheels 3/4
  Greys Court 9/16
  see also horsewheels and donkeywheels
Donkin, Bryan; engines 8/9, 10; 10/13
Donnington, W. Berks; brickworks 16/2, 5
Dorman, Pope & Co Ltd, of Abington Brewery, Northampton 14/19, 26
Dorman, W.; Galloping Horses fairground roundabout 6/12
Douglas, J. and William, millers of Chipping Warden, Nhants 12/23
dovecotes
  Berkshire 1/2
  classes of 9/11-12
  Milcombe, Oxon 9/12
  Nhants 6/7; 9/11-12, 17
Downings, brewers of Oxford 15/3
drain-pipes, hand and mechanized manufacture 13/10
Drawater Mills see under Islip, Nhants
drawbridges, lifting, Grand Junction Canal 6/9
Drayton Estate (Lowick), Islip, Nhants 8/15
Drayton House, Nhants; horse wheel 6/2
Drayton Iron and Steel Co Ltd 11/23
Drew, Robert, miller of Islip, Nhants 12/28
Ducklington, Oxon; watermills 10/2, 3
Duddington, Nhants; watermill 12/21, 25
Duley & Son, Northampton iron founders 12/4, 6
Dulley, W. & Sons Ltd, brewers of Wellingborough, Nhants 14/26
Dunchurch-Old Stratford turnpike 7/4
Duncote Lane, near Towcester; turnpike ticket gate 7/4
Dunkerley, Richard, of Blisworth 6/11
Dunkley, Samuel and Henry, millers of Rothersthorpe, Nhants 12/17
Dunmore, A., of Irthlingborough, Nhants 13/17
Dunstable, Beds; courses 1/2; 2/2
Durham, James & Son, brewers of Northampton 14/16, 26
Durrans, Paul, brewer of Oundle, Nhants 14/26
Duston, Nhants
  brickworks 6/10; 13/20
  ironstone quarries 3/3; 6/10; 11/20
  railway 6/10
  watermills 12/21, 25, 31
Duston Iron Ore Co 6/10; 13/20
Dyer, Herbert Bailey, miller of Cuttle Mill, Paulerspury, Nhants 12/24
dynamos
  GEC 4-pole 16/13
  India Rubber, Gutta Percha and Telegraph Works Ltd, Silvertown, London,
      Type K machine No 967 16/13
  Laurence Scott of Norwich 16/13
  see also engine-dynamo sets
Dyton, William, miller of Standlake, Oxon 13/4-5