On this episode of Texas Matters, we look at: The economy of Texas cattle drives. As San Antonio celebrates its tricentennial, we at two stories, beginning with a look at the art of 1718 (10:00). Then, as the Alamo City celebrates its 300th birthday, there will more than a little tequila used in the celebration. Here's the story behind that smooth and firey inebriant and its tie to San Antonio (19:45).