Although that fire destroyed the official county documents, some land tract records were saved. Using this and other primary source information, Richard F. Bales created a scale drawing that reconstructed the OLeary neighborhood. Next he turned to the transcriptsmore than 1,100 handwritten pagesfrom an investigation conducted by the Board of Police and Fire Commissioners, which interviewed 50 people over the course of 12 days. The boards final report, published in the Chicago newspapers on December 12, 1871, indicates that commissioners were unable to determine the cause of the fire. And yet, by analyzing the 50 witnesses testimonies, the author concludes that the commissioners could have determined the cause of the fire had they desired to do so. Being more concerned with saving their own reputation from post-fire reports of incompetence, drunkenness and bribery, the commissioners failed to press forward for an answer. The author has uncovered solid evidence as to what really caused the Great Chicago Fire.



