Microfilm copies of Ordnance Survey maps 1st edition Ordnance Survey 25-inch maps: Derbyshire Sheet 45..1-16 Derbyshire Sheet 46.1, 5, 9, 13 Derbyshire Sheet 47.4, 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, 8 Derbyshire Sheet 53.1 - 8, 11, 12 Derbyshire Sheet 54..1-16 Derbyshire Sheet 55..1-16 Derbyshire Sheet 56.1 - 3, 5 - 7, 9 - 11 Derbyshire Sheet 57.1 - 4, 6 - 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..1-15 Derbyshire Sheet 61.1, 2, 5 Derbyshire Sheet 62.3, 4, 8 Derbyshire Sheet 63.1 - 3, 5 - 7, 9, 10 20th cent