Lincoln's speech is very important in history, but modern scholars do not agree about the words of the speech. There are many different modern versions printed in newspaper accounts of the event. Among these, the Bliss version, written some time after the speech for a friend, is seen by lots of people as the most reliable text. Its text is different, however, from the written versions prepared by Lincoln before and after his speech. It is the only version Lincoln put his signature on. It is also the last he is known to have written.