After releasing a string of critically acclaimed albums as Smog, singer/songwriter Bill Callahan began making music under his own name in 2007. The switch reflected how much richer and deeper his music had become over the years, both literally and figuratively: His songwriting, which used the imagery of the American West in thoughtful yet rugged ways that spoke to the present as well as the past, had become increasingly contemplative, while the drawl he used to deliver them had grown lower and slower over the years.