The core Black Hawk County History includes biographical directories and war records of the Civil War veterans. Published in 1878, only one original settler of the county had written his memoirs, and this information was gratefully used by the publishers. James Newell first visited the county in the spring of 1845. He was told to be careful, for this country was neutral ground for the Sac, Fox, Winnebago, and Sioux Tribes. This history is supplemented with much related information, such as the Constitution of the U. S., statistics, and general histories of the State of Iowa and the northwestern United States.