In American National Bank of Nashville, Tennessee, v. Miller, Agent of the First National Bank of Macon, Georgia, 229 U. S. 517, 521, 522, 33 S. Ct. 883, 884, 57 L. Ed. 1310 (1913), the Supreme Court said: "This presents another phase of the oftrecurring question as to when and how far notice to an agent is notice to his principal. In view of the many decisions on the subject, it is unnecessary to do more than to apply them to the facts of this case. If Plant, within the scope of his office, had knowledge of a fact which it was his duty to declare, and not to his interest to conceal, then his knowledge is to be treated as that of the bank. For he is then presumed to have done what he ought to have done, and to have actually given the information to his principal. "But if the fact of his own insolvency and of his personal indebtedness to the Nashville bank were matters which it was to his interest to conceal, the law does not by a fiction charge the Macon bank, of which he was president, with notice of facts which the agent not only did not disclose, but which he was interested in concealing."