Field's activities brought him into contact with a number of prominent persons on both sides of the Atlantic – including Lord Clarendon and William Ewart Gladstone, the British Finance Minister at the time. Field's communications with Gladstone would become important in the middle of the American Civil War, when three letters he received from Gladstone between November 27, 1862 and December 9, 1862 caused a furor, because Gladstone appeared to express support of the secessionist southern states in forming the Confederate States of America.