As we learned in class, Vaughan Williams pronounced his first name "Rafe," not "Ralph." He played organ, piano, violin, and viola, and was drawn to composing at a young age. Besides writing music, he was a collector of English folk songs and helped to edit The English Hymnal. During WWI, he enlisted in the army as a 42-year old medic. Here is a video discussing his experiences and how they affected his music.
You can see more of these videos here.
One of my favorite pieces by RVW is his Six Studies in English Folksong. It was originally written for cello and piano, and it has been transcribed for many different solo instruments, including viola and tuba. Here is the original version as performed by Denise Djokic:
Here's one last page with some interesting facts. Enjoy!