CHAPTER XV.

A STRUGGLE FOR LIFE. "My proofs are these," answered Margaret, forcing herself to speak quietly. "He acts exactly as a man would act who was personating some one else. He knows the true St. Udo's history to a certain extent, and cleverly acts upon it; but go beyond the part he has rehearsed, and he betrays the most extraordinary confusion. When first I saw him I was astonished at the change which a few months in America had made. The longer I studied him the more palpable became his disguise to my eyes; and I am no…