Big three of congressional tax hearing. Washington, D.C., Aug. 18. The income tax payers are not the only ones having headaches these days for the Senators and Treasury experts who are handling the congressional tax investigation are having theirs too. Here we see in a huddle, left to right: Senator Pat Harrison of Mississippi, Co-Chairman of the Joint Congressional Tax Committee; Lovel H. Parker, Treasury Income Tax expert who assisted the Committee in the investigation; and Senator John G. Townsend of Delaware, Republican member o the Committee, 8/18/37