Work Songs at least had two functions: one to benefit the slaves and another to benefit overseers. When a group of slaves had to work together on a hard task, like carrying a heavy load, singing would provide a rhythm that allowed them to coordinate their movements. When picking crops, music was not necessary, but when there was silence it would be uncomfortable for the overseers. Even though there was a presence of melancholy in songs, Southern slave owners would interpret that their slaves were happy and content, possibly because of their singing. African American Recreational Songs Even if slave owners attempted to forbid things like drums or remnants of African culture, they did not seem to mind them learning European instruments and music. In some cases, black string players would be invited to play to entertain white audiences. Between the week of Christmas and New Years’, owners would give their slaves a holiday. This provided a chance for slave families who had different masters to come together, otherwise, they would not go anywhere. Some slaves would craft items, but masters detested industrious slaves. So most slaves would spend their recreational time doing other things, like dancing and singing. Masters approved of such activities, but they may not have listened carefully to the songs that were performed. Folk songs The original Thirteen Colonies of the United States were all former British possessions, and Anglo culture became a major foundation for American folk and popular music. Many American folk songs are identical to British songs in arrangements, but with new lyrics, often as parodies of the original material. Anglo-American traditional music also includes a variety of broadside ballads, humorous stories and tall tales, and disaster songs regarding mining, shipwrecks and murder. Folk songs may be classified by subject matter, such as: drinking songs, sporting songs, train songs, work songs, war songs, and ballads. The Star-Spangled Banner's tune was adapted from an old English drinking song by John Stafford Smith called "To Anacreon in Heaven." "The Ballad of Casey Jones" is a traditional song about railroad engineer Casey Jones and his death at the controls of the train he was driving. It tells of how Jones and his fireman Sim Webb raced their locomotive to make up for lost time, but discovered another train ahead of them on the line, and how Jones remained on board to try to stop the train