In modern political history the expression "cave of Adullam" (hence "Adullamites") came into common use (being first employed in a speech by John Bright on the 13th of March 1866) with regard to the independent attitude of Robert Lowe (Lord Sherbrooke), Edward Horsman and their Liberal supporters in opposition to the Reform Bill of 1866.
He published Garibaldi and the Making of Italy (1911); Life of John Bright (1913); Clio, a Muse, and other Essays (1913); Scenes from Italy's War (1919).
Howe enlisted the support of John Bright and other members of parliament, but the imperial government was firm, and the duke of Buckingham, as colonial secretary, soon informed the governor-general in a despatch that consent could not be given for the withdrawal of Nova Scotia from the Dominion.
Other congresses were held at Frankfurt, again in London, and in 1853 at Manchester, where Richard Cobden and John Bright took part in the discussions.
There were eleven children of this marriage, of whom John Bright was the second, but the death of his elder brother in childhood made him the eldest son.