Statistics for occurrence #1 of “Mr. Stanley” in chapter 13 of Edward L. Pierce, Memoir and letters of Charles Sumner: volume 1:

...comparatively early age. You are right in supposing that my brother was one of a small band who visited the States in 1824-25; consisting besides himself of the late Prime-Minister, Lord Derby (then Mr. Stanley ), Mr. Labouchere, who was afterwards a member of Lord Melbourne's cabinet and died as Lord Taunton, as well as Mr. Evelyn Denison, who eventually became Speaker of the House of Commons, and died only...
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