As American economic interests expanded in Central America in the early twentieth century, many British representatives concluded that the Foreign Office would have to devise some method to protect existing British investments against American encroachment. When Secretary of State Knox visited Central America in 1912, he and Sir Lionel E. G. Carden, the British Minister to Central America, discussed Central American affairs when they met in Guatemala on March 16. Knox could scarcely have been very sympathetic as Carden expounded the British point of view, for the Department of State believed that the greatest obstacle to the success of its policy in Central America was none other than the British Minister. As early as April, 1910, Knox had unsuccessfully tried to have Carden transferred from his post; the attempt failed because Sir Edward Grey backed up his Minister.