The first series in the Harold Lough papers consists of Lough's correspondence, both incoming and outgoing, while he was serving as State Senator from District 5 (Latah County) from 1957 to 1968. Many of these letters are from constituents and express their views on matters before the legislature; Lough's replies are often attached to the original letter. There are also some letters from Idaho's Senators in Washington, D.C. requesting information on local opinion in regard to bills in the U.S. Congress; an example of this is a letter from Senator Jordan concerning the Wild Rivers Bill. There are also letters from U.S. Congressmen concerning the status of Federal projects in Idaho, such as the new post office-federal building in Moscow.