Campbell, Sir Henry (1856–1924), secretary to Charles Stewart Parnell, MP, and town clerk of Dublin, was born at Kilcoo, Co. Down, second son of Patrick Campbell and his wife, Margaret (née Boden). He began his career as a grocer's assistant at Newry but soon moved to Newcastle upon Tyne, where he lived with an uncle and joined the staff of the North Eastern Railway Co. Moving in Irish circles there, he became acquainted with John Barry (qv) and T. M. Healy (qv). On Healy's recommendation he became (1880) private secretary to Charles Stewart Parnell (qv), a position he held until Parnell's death in 1891; his discreet, efficient but earnest manner served Parnell well. From 1885 until 1892 Campbell was MP for Fermanagh South. In 1893 he became town clerk of Dublin (then a Parnellite stronghold), continuing in this office until December 1920. He stood aloof from council controversies until faced in the January 1920 local elections with a hostile Sinn Féin majority that forced his retirement.
Healy states that Campbell, though a catholic, became a freemason in London and later in Dublin. He was knighted in 1921 and died 6 March 1924 in London. He married, in 1879, Jenny Brewis of Newcastle upon Tyne, and, after her death in 1906, Alice Harbottle (née Fogan), who survived him. With his first wife he had three sons (Henry, Charles Stewart Parnell, and Colin Robert Boden) and one daughter. He had a house at Shankill, Co. Dublin, but his home was Greenwood Park near Newry.