I heard this song today at the end of a tour documentary featuring the Fleet Foxes' leading man Robin Pecknold. You can view the short documentary here. It's pretty cool and worth a look. What's also worth a look is the vintage photography that the Fleet Foxes use as the backdrop to their website. Listen to the classic sixties folk (the song heard on the documentary) by Jackson C. Frank below.
Jackson C. Frank - "Blues Run The Game"