While visiting Ford's Theatre around noon to pick up his mail, Booth learned that Lincoln and Grant were to visit the theater that evening for a performance of Our American Cousin. This provided him with an especially good opportunity to attack Lincoln since, having performed there several times, he knew the theater's layout and was familiar to its staff. Booth went to Mary Surratt's boarding house in Washington, D.C., and asked her to deliver a package to her tavern in Surrattsville, Maryland. He also asked her to tell her tenant Louis J. Weichmann to ready the guns and ammunition that Booth had previously stored at the tavern.