Minutes of sub-committees usually appointed "ad hoc" Committees as follows: Appointment of Surveyor, 1852-1876, Appointment of Collector, 1852, Declaring Streets Highways, 1852, Prevention of Cholera and Water Supply, 1853, Gas Works, 1855, Accounts, 1857-1858, Public Health Amendment/Local Government Bill, 1858, Joint Sewerage and Paving, 1864-1876, Purchase of Gas and Water Works, 1867-1868, Repairing Market Place, 1871 Appointment of Medical Officer of Health, 1873, Smallpox Hospital (Derby and Litchurch Sanitary Committees), 1875-1876, Parliamentary and Special Purposes, 1875, Team and Plant, 1876-1877, Special Drainage, 1878, Litchurch Rating, 1877, Fire Brigade Arrangements, 1883, By-laws, 1882-1883 1852-1883