William McArthur (Lord Mayor of London) William McArthur (Lord Mayor of London) Sir William McArthur, (6 July 1809 – 16 November 1887) was an Irish businessman and Lord Mayor of London, and a Liberal Party politician who sat in the House of Commons from 1868 to 1885. McArthur was born at Malin, County Donegal, the son of Rev. John McArthur, a Methodist minister in Londonderry. 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
John Spencer (Lord Mayor of London) Bocking, which he had obtained from the Queen on 1 August 1599. Spencer left nothing to public purposes. In Canonbury, a residential square which was laid out in 1963, is named after Sir John Spencer. He, at the time, was Lord Mayor of London and had a country retreat at Canonbury in the early 17th Century. John Spencer Square had former residents include Labour Party Cabinet Minister Barbara Castle and her husband Ted Castle, journalist and GLC Alderman. By his wife, Alice Bromfield, Spencer had an only child, Elizabeth, who in 1598 was sought in marriage by William Compton, 2nd