McArthur was born at
Malin in
Inishowen,
County Donegal. He was the fifth child, and first surviving son, of John McArthur, a poor Scots-Irish farmer who had converted to the Methodists from his Scots-Irish Presbyterianism in the 1790s, and subsequently became a Methodist minister in
Derry. In 1821 he was apprenticed to a woollen draper in
Enniskillen. He moved to
Lurgan in 1825 where he was a merchant and in 1831 established a drapery business in Derry initially in a partnership, but later on his own. In 1841 his brother
Alexander McArthur went to Australia and the business was trading with several destinations in Australia. He was also a director of the City Bank, the
Bank of Australasia and the Australian Telegraph Co. He was a
JP for Surrey and a
Deputy Lieutenant for the City of London. At the
1865 general election McArthur stood unsuccessfully for Parliament in
Pontefract. From 1867 to 1868 he was Sheriff of London and Middlesex. and held the seat until borough was divided under the
Redistribution of Seats Act 1885. During 1886 he broke with Gladstone, and sided with the Liberal Unionists. He had several interests in social and reforming organisations, including the Orphan Working School of Haverstock Hill and Hornsey Rise, and the
Aborigines' Protection Society. In 1883 he opened Centenary Hall, Cottington Street, Kennington, and is remembered on a commemorative stone. McArthur died (aged 78) on the morning of 16 November 1887 in a carriage of the Metropolitan Railway near Paddington, while travelling into the City to chair a board meeting of the Star Life Assurance Society. The inquest found that his death had been caused by "syncope of the heart, brought on by over-exertion in hurrying for the train". In January 1888 his brother Alexander was elected to fill the vacant seat on that company`s board, and William Mewburn was elected the company`s chairman. Sir William McArthur was buried in
Norwood cemetery. Sir William left sums for
Methodist College Belfast to build its girls boarding hall. McArthur married Marianne McElwaine in 1843. ==References==