Microfilm copies of Ordnance Survey maps 1st edition Ordnance Survey 25-inch maps: Derbyshire Sheet 40.1 - 16 Derbyshire Sheet 41.1, 5, 9 Derbyshire Sheet 42.8, 11, 12, 15, 16 Derbyshire Sheet 43.1 - 16 Derbyshire Sheet 44.1 - 16 Derbyshire Sheet 45.1 - 16 Derbyshire Sheet 46.1, 5, 9, 13 Derbyshire Sheet 47.3, 4, 7, 8, 11, 12, 15, 16 Derbyshire Sheet 48.1 - 16 Derbyshire Sheet 49.1 - 16 Derbyshire Sheet 50.1 - 16 Derbyshire Sheet 51.1, 2, 5, 6, 9, 10, 13, 14 Derbyshire Sheet 52.3, 4, 7, 8 Derbyshire Sheet 53.1 - 12, 14 - 16 Derbyshire Sheet 54.1 - 16 Derbyshire Sheet 55.1 - 16 Derbyshire Sheet 56.1 - 3, 5 - 7, 9 - 10 Derbyshire Sheet 57.1 - 8, 10 - 12, 14, 16 Derbyshire Sheet 58.1 - 7, 9 - 11, 13, 14 Derbyshire Sheet 59.3, 4, 7, 8, 10 - 12, 14 - 16 Derbyshire Sheet 60.1, 5 - 14 Derbyshire Sheet 66.1, 2, 5 Derbyshire Sheet 67.3, 4, 6 - 8, 10 Derbyshire Sheet 68.1, 3, 4, 6 - 11, 14, 15 20th cent