The earliest written evidence of the word "soccer" comes from a Latin document called "The Laws of Roman Football" that was published in 1615. The rules described how players should be allowed to score goals by means of shots with the head as well as any part of the body except the hands and arms. They also specified that players could use only leather balls that were played on a field that was 110 yards by 60 yards. Almost a century later, in 1859, William Clough of Nottingham introduced several changes to the original rules of football, including allowing men to wear shirts with sleeves. This new form of football became known as "association football." In 1868, the FA began promoting association football, helping to create the modern game we know today. By 1889, the number of people participating in associations football had increased so much that the FA decided it was time to formalize the rules again. So they created a new code of laws for the sport which is still used today.