TV-14
S21 • E13 Feb 21, 2010 23m6.56.3
Whilst researching for her family tree Lisa uncovers the 1860 diary of little Eliza Simpson,who helped Colonel Burns' slave Virgil escape to Canada but the diary ends abruptly and at the school project Milhouse informs her that Eliza in fact helped put Burns on Virgil's trail. Fortunately Grampa knows the true ending to the story,which accounts for why the Simpsons have Negro blood in them.
