With his gang, Pecos Bill was able to create the biggest ranch in the Southwest. Bill and his men had so many cattle that they needed all of New Mexico to hold them. Arizona was the pasture where the cattle ate grass. Pecos Bill invented the art of being a cowboy. He invented the skill of throwing a special rope called a lasso over a cow's head to catch wandering cattle. Some say he used a rattlesnake for a lasso. Others say he made a lasso so big that it circled the whole Earth. Bill invented the method of using a hot branding iron to permanently put the mark of a ranch on a cow's skin. That helped stop people from stealing cattle. Some say he invented cowboy songs to help calm the cattle and make the cowboy's life easier. But he is also said to have invented tarantulas and scorpions as jokes. Cowboys have had trouble with those poisonous creatures ever since.