LIGHT, Alexander Luder, Canadian engineer, born in Durham, England, 17 April, 1822. He came to Canada in 1834, attended the Kingston grammar school, and in 1842 became assistant engineer on the board of works of Canada. In 1846 he entered the employ of the Great Western railway, in 1851 was appointed chief engineer of the St. Andrews and Quebec (now New Brunswick and Canada) railway. Subsequently he was chief engineer of government railways in Nova Scotia and New Brunswick, and built the European and North American railway. He went to England in 1863, was elected a member of the institute of civil engineers there, and soon afterward appointed engineer of the Santos and Sao Paulo railway in Brazil. He was in charge of the construction of a section of the Intercolonial railway in 1869, in 1874 became government engineer for the province of Quebec, and in 1884 was chosen by the Dominion government as engineer in charge of surveys of one division of the proposed short line railway from Montreal to St. John and Halifax.