The LA-via-England singer-songwriter released her fourth album, Once I Was an Eagle, May 27 on Ribbon Music and, while I’m not one to typically be so blunt, it’s entirely wonderful. When Marling introduced her set at Seattle’s Columbia City Theater on May 15, she opened with these four tracks and, before the album was out, released a movie featuring them. Before May 27, then, I was laboring under the delusion that Once I Was an Eagle began with one epic…