 Complete the following phrase:  Not all Capitol hauntings are related to people who worked there. The Demon Cat is alleged to prowl the halls of Congress, and make appearances just before a national tragedy or change in Presidential administration. It was first seen in the early part of the 19th century, and a night watchman shot at it in 1862. It has also been seen by other night watchmen and members of the Capitol Police. It appeared before the assassination of President Abraham Lincoln, the 