. . . "'Respondent also admits that his father, on or about March 5, 1849, when respondent was about 14 years of age, declared his intention to become a citizen of the United States, and to renounce and abjure forever all allegiance and fidelity to every foreign prince, potentate, state, and sovereignty whatever, and particularly the queen of Great Britain and Ireland, and that the alleged exemplificatio" . .