On Sunday, Sept. 13, Chicago-based Leslie Hindman will host a 220-lot auction featuring postwar, Contemporary, American and European art. The top lot is an 1890 Frederick William MacMonnies bronze of American patriot Nathan Hale. Considered the State Hero of Connecticut, and widely acknowledged as America's first spy, Hale was 21 years old when he was hanged by the British in 1776. From the gallows, he uttered his famous last words, "I only regret that I have but one life to lose for my country." A highly important and iconic American artwork, the 28¼-inch bronze is estimated at $100,000-$150,000. A larger version is in New York's City Hall Park.