After the parliamentary session, which produced the Second Reform Bill, Disraeli's eventual assumption of the leadership of the Conservative Party was all but assured. While he was still opposed by elements of the party's right wing (most notably the Marquess of Salisbury, himself a future prime minister), his role in securing the passage of the bill, in particular his showing against William Ewart Gladstone, had won him the adulation of a wide base of the parliamentary party. The only unknown was the health of the Earl of Derby, still very much prime minister, Conservative leader, and Disraeli's colleague.
Derby's health, however, had been in decline for some time, and he finally resigned in February and advised Queen Victoria to send for Disraeli. Thus on 27 February 1868 Benjamin Disraeli became Prime Minister of the United Kingdom. He reportedly said of the event later, "I have climbed to the top of the greasy pole." However, the Conservatives were still a minority in the House of Commons, and the enaction of the Reform Bill required the calling of new election. Disraeli's term as prime minister would therefore be fairly short, unless the Conservatives managed to win the general election.
This Cabinet of Derby's is the first for which a complete collection of photographs exists of its members.
Changes
March 1867: Lord Carnarvon, Lord Cranborne, and General Peel resign from the cabinet over the Reform Bill. They are succeeded by the Duke of Buckingham, Sir Stafford Northcote, and Sir John Pakington, respectively. Taking their places were three new members of the cabinet: the Duke of Marlborough, the Duke of Richmond, and Henry Lowry-Corry.
May 1867: Gathorne Hardy replaces Spencer Walpole as Home Secretary. Walpole remains in the cabinet as Minister without Portfolio. Hardy's replacement as President of the Poor Law Board is not in the cabinet.