In October 1901, Collins became Master of the Rolls after the death of Sir Archibald Smith,[3] and the following month was appointed to the accompanying post of Chairman of the Historical Manuscripts Commission.[5] On 6 March 1907 he was appointed a Lord of Appeal in Ordinary, receiving additionally a life peerage with the title Baron Collins, of Kensington in the County of London.[1] Lord Collins was judge of the trial of Oscar Wilde's libel prosecution against the Marquess of Queensberry on 3 April 1895 (as noted in "The Trials of Oscar Wilde", by H. Montgomery Hyde (1962) at p97).[1] His wife, Jane Ogle, Lady Collins (d. 1934), is buried in Brompton Cemetery.His younger son, Sir Stephen Henn-Collins, became a High Court judge.