I dug out my old copy of "Happy Trails: yesterday and have been listening to it ever since. As I did when it first appeared, I cannot but marvel at how an entire album based on one Bo Diddly riff can sound so good. Other stuff of its era has not held up so well. With the possible exception of "Pride of Man," on The Messenger Service's first album, this is probably their best stuff to make it onto vinyl. They, like The Thirteenth Floor Elevators (the jug as a psychedelic instrument!) were supposed to be great live, but I never had a chance to actually see them perform.