These carriage bolts were melted and fused together during the Great Chicago Fire of 1871. They were found and saved by Mr. I.P. Rumsey during the clean-up.
Small items like these fused carriage bolts were saved by Chicagoans as mementos of the destruction caused by the Great Chicago Fire of 1871. The fire began the evening of October 8th on the city's southwest side and burned for 36 hours. Nearly 300 Chicagoans were killed and three and half city miles destroyed. The heat was intense enough to melt iron as demonstrated by these fused bolts.