LERNA, IL - The Lincoln Log Cabin State Historic Site will hos the Annual Bluegrass Jam session Sunday, August 14th in Lerna. Musicians from Illinois and Indiana will take part in the jam featuring guitars, banjos, and mandolins. The Bluegrass Jam session is from 11 a.m. to 5 p.m. Sunday, August 14th at the State Historic Site. Volunteers will sell food and drinks with the proceeds going to support the educational and interpretive programs at Lincoln Log Cabin.