An exhibition of controversial images and objects associated with Uncle Tom's Cabin is on display at Bowdoin College in Brunswick - the town where Harriet Beecher Stowe wrote much of the groundbreaking mid-19th century novel. With its anti-slavery message, the book is often credited as one of the factors that helped bring about the Civil War. The novel also spawned a wealth of spinoff musical shows, stage productions and images portraying African-Americans in what could be considered a racist light.