Investigation of air mail and ocean mail contracts communication from William P. MacCracken, Jr., in response to a citation to appear before the bar of the Senate on the 9th day of February 1934, on account of the alleged destruction and removal of certain papers in connection with the investigation of air mail and ocean mail contracts, together with responses of L. H. Brittin, Harris M. Hanshue, and Gilbert L. Givvin, respectively, to the citation of the Senate of February 5, 1934.