Under the Common Law all gaols belonged to the King and by 5 Henry 4. c. 10, it was enacted that none should be imprisoned by any justice of the peace, but only in the "Common Gaol," saving the franchises of those who have gaols. Except in special cases the gaols were under the control of the sheriff, but the gaols which great noblemen and bishops were allowed to maintain must have been governed by these dignitaries, while the gaols which towns, liberties, or other bodies, having no sheriffs, were empowered by charter or otherwise to keep, must have been under the governing authorities of those bodies. By the 39th Eliz., another place of imprisonment was established for certain classes of offenders, under the name of "House of Correction," and 7 James 1. c. 4, directs that, in every county, such a house should be established, and means provided for setting rogues and idle persons to work. These establishments were under the justices. The custom gradually grew up of committing criminals of all classes to Houses of Correction, and was legalized by 6 Geo. 1. c. 19 and 5 & 6 Will. 4. c. 38. s. 3, by which latter Act even sentence of death might be carried out at these places; but debtors could still be committed only to the Gaol and vagrants only to the House of Correction; and though it became common to unite the two buildings under one roof, with one governing staff, the two superior jurisdictions of the sheriff and the justices over what was virtually one establishment were still maintained. The title "House of Correction" was subsequently abolished by the Prison Act, 1865, and since that date "Local Prison" has been the official designation of the place of detention of persons sentenced to imprisonment. A "Convict Prison" is a place of detention for a person sentenced to penal servitude. There are fifty-six Local Prisons in which sentences of imprisonment are served, (though 14 have been temporarily closed during the war). They vary in size, from the large Local Prisons in London, Manchester and Liverpool, with an average population of 1,000 or more, to the small prisons in country districts with a daily average of less than 100. By the Prison Act of 1877, the entire management of these prisons was transferred from the various local jurisdictions to the State, and the cost incidental to their maintenance from the local rates to the Imperial Exchequer. They are vested in the Secretary of State for the Home Department, and are administered, subject to his approval, by a body of Commissioners appointed by the Crown.