(NCC) and later the LMS (NCC) continued to use the system adding new classes as required. Northern Counties Committee (1903–1949) Cross-Border Lines Following the division of Ireland in 1921 into two administrations, a number of railways now found themselves operating on both sides of the newly created boundary between Northern Ireland and the Irish Free State (later Republic of Ireland). West Donegal Railway The West Donegal Railway became the Donegal Railway in 1892; and the County Donegal Railways Joint Committee after being jointly acquired in 1906 by the Great Northern Railway and the Midland Railway's Northern Counties Committee. Dundalk, Newry and Greenore Railway Great Northern Railway The Great Northern Railway (GNR) was formed in 1876 acquiring a variety of locomotives. Nos 1 to 23 were from Dublin and Drogheda Railway; Nos. 24 to 41 from the Dublin and Belfast Junction Railway; Nos. 43 to circa 78 from the Irish North Western Railway and Londonderry and Enniskillen Railway; Numbers in the eighties from the Newry and Armagh Railway and nos. 100 to 141 from the Ulster Railway. Later acquisitions in the 1880s from the Newry, Warrenpoint, and Rostrevor and the Belfast Central Railway were numbered in the Nineties. The GNR straddled the border between the Republic and Northern Ireland (after 1921), and so was not incorporated in either the CIÉ or Ulster Transport Authority. However, mounting losses saw the network purchased jointly by the Irish and British governments on 1 September 1953. It was run as a joint board, independent of the CIÉ and UTA, until 30 September 1958 when it was dissolved and the remaining stock split equally between the two railways. ? (1877–1881) James Crawford Park (1881–1895) Charles Clifford (1895–1912) G. T. Glover (1912–1933) G. B. Howden (1933–1939) H. R. McIntosh (1939–1953) Londonderry and Lough Swilly Railway Broad gauge locomotives (1862–1882) Narrow gauge locomotives (1882–1954) Sligo, Leitrim and Northern Counties Railway The Sligo, Leitrim and Northern Counties Railway was a small cross-border railway that closed in 1957. Its locomotive fleet never carried numbers, only names. Irish Free State and Republic of Ireland The railways wholly in the Irish Free State were merged into one private company — Great Southern Railways — in 1925. The GSR renumbered all the broad gauge locomotives into one series with the former Great Southern and Western Railway locomotives retaining their old number. The GSR had two parallel classification systems – a numerical system which