Just about the time when the National Guard was taking possession of Homestead, a special committee detailed by the National House of Representatives to investigate the trouble between the Carnegie Company and its employees, arrived in Pittsburgh. The committee consisted of W. C. Oates, of Alabama, chairman; W. H. Bynum, of Indiana; C. J. Boatner, of Louisiana; E. B. Taylor, of Ohio, and Case Broderick, of Kansas. Messrs. Taylor and Broderick were the only Republican members. The committee visited Homestead in the afternoon, and at 7.30 P. M. began the hearing of testimony. H. C. Frick was the first witness. In answer to leading questions he detailed the membership, resources and operations of the Carnegie Company, the wages paid at Homestead, the nature of the sliding scale and the events leading up to the lock-out. Judge Oates asked: "Not counting anything by way of interest on investment, what is the cost per ton of billets?" MR. FRICK.--I hardly think that is a fair question. I do not think you ought to ask me to go into that. COL. TAYLOR.--Would you object to informing us of the cost per ton of steel? Mr. Frick answered that he would. MR. BOATNER.--Don't feel disposed to give away the secrets of the trade, eh? To this the witness responded that the matter in question was a trade secret and must be respected as such. Mr. Frick was then questioned concerning his enlistment of Pinkerton guards. He had acted, he said, on the conviction, gathered from prior experience, that the sheriff was powerless. After June 24, the firm had decided to hire the guards at $5 a day per man, and to put new workmen into the mill. The witness read a copy of a letter which he had sent to Robert A. Pinkerton under date of June 25. The communication called for 300 guards to be used in enabling the starting of the Homestead mill on July 6, directed the massing of the force at Ashtabula, O. and advised "absolute secresy in the movement of these men, so that no demonstration can be made while they are in route." It concluded as follows: "As soon as your men are upon the premises, we will notify the sheriff and ask that they be deputized either at once or immediately upon an outbreak of such a character as to render such a step desirable." Mr. Frick was plied with interrogations concerning the Little Bill, the barges and the famous fence topped with barbed-wire, and Mr. Boatner asked particularly as to the "port-holes" in the latter. "They were made," the witness replied gravely, "for the purpose of looking out to see who might be on the outside."