JULY 15TH. —Early this morning, Major Tyler was seated in the Secretary’s chair, prepared to receive the visitors. This, I suppose, was of course in pursuance of the Secretary’s request; and accordingly the door-keeper ushered in the people. But not long after Col. Bledsoe arrived, and exhibited to me an order from the President for him to act as Secretary of War pro tem. The colonel was in high spirits, and full dress; and seemed in no measure piqued at Major Tyler for occupying the Secretary’s chair. The Secretary must have been aware that the colonel was to act during his absence but, probably, supposed it proper that the major, from his suavity of manners, was best qualified for the reception of the visitors. He had been longer in the department, and was more familiar with the routine of business. Yet the colonel was not satisfied; and accordingly requested me to intimate the fact to Major Tyler, of which, it seemed, he had no previous information, that the President had appointed Col. Bledsoe to act as Secretary of War during the absence of Mr. Walker. The major retired from the office immediately, relinquishing his post with grace.