In 1863, on the recommendation of Henderson who had become chairman of the board of directors of convict prisons, Du Cane was appointed director of convict prisons, as well as an inspector of military prisons. He administered the system of penal servitude as it was reformed by the
Prison Act 1865, and made the arrangements for additional prison accommodation after the abolition of
penal transportation in 1867. In 1869 Du Cane succeeded Henderson as chairman of the board of directors of convict prisons, surveyor-general of prisons, and inspector-general of military prisons. On 5 February 1864 he was promoted first captain in his corps; on 5 July 1872 major; on 11 December 1873 lieutenant-colonel; and four years later brevet-colonel. He was placed on the supernumerary list in August 1877. The charge of the colonial convict prisons was transferred to Du Cane in 1869. An advocate of using prison labour for works of national utility, (on which he read a paper before the
Society of Arts in 1871) Du Cane provided for the carrying out by convicts of the breakwater and works of defence at
Portland, the docks at
Portsmouth and Chatham, and additional prison accommodation. At the International Prison Congress in London in 1872 Du Cane described the British system of
penal servitude. Du Cane's main success as prison administrator was the reorganisation of county and borough prisons, which had previously been managed by some 2000 local justices, and largely maintained by local funds. Du Cane in 1873 submitted to the secretary of state a comprehensive scheme for the transfer to the government of all local prisons and the whole cost of their maintenance. The reform was formalised by the
Prison Act 1877, when Du Cane, who had been made C.B., civil division, on 27 March 1873, was promoted K.C.B., civil division, and became chairman of the three prison commissioners, under the new act to reorganise and administer the county and borough prisons. On 1 April 1878 these prisons came under government control. Their number was soon reduced by one-half, the rules made uniform, the progressive system of discipline adopted, the staff co-ordinated into a single service with a regular system of promotion, structural and other improvements introduced, and the cost of maintenance largely reduced. Employment of prisoners was developed and the discharged prisoner was helped to earn a living. ==Criminology==