Tower's letters (some typed, mostly handwritten) when he was Secretary of Legation at Peking to Sir Ernest Satow, his superior and the Minister in Peking 1900-06, are in the Satow Papers held at the National Archives of the UK.[5][non-primary source needed] Satow felt that Tower would have been a worthy successor.[6][non-primary source needed]
In 1907, while British Ambassador to Mexico, Tower donated a trophy in order to establish the Copa México. For this reason, in the early days of the competition it was known as the Copa Tower.
Tower was the British Ambassador in Argentina and Paraguay for the duration of the First World War. During the war years he worked energetically to secure British wheat imports from Argentina, and to persuade British-owned companies to suspend German employees and refuse to do business with German firms.[7]