Starting to work on a documentary about Sidney. The first mystery is why has no one heard of him. I found this answer on-line, with some wonderful pictures of the family home at Penshurst:
LT: What do you think accounts for Sidney’s absence from the majority of college curriculums?
AO: There are many writers and works vying for inclusion in the current undergraduate curriculum and it may well come down to the preferences of professors or their need to attract students in the postmodern era. My son, Kevin, just completed an English degree that, except for a few foundation courses, concentrated on works of the last two centuries. Another son, David, certainly did not meet Sidney on his English survey course in college.
See http://www.literarytraveler.com/articles/rediscovering-sir-philip-sidney-at-penshurst-place/ and also "Behind the Article: A Further Look at Sir Philip Sidney, Penshurst Place and the Study of the English Renaissance": http://www.literarytraveler.net/blog/2012/08/behind-the-article-a-further-look-at-sir-philip-sidney-penshurst-place-and-the-study-of-the-english-renaissance/
The articles links to these photos on a flickr account of Penshurst, where Philip Sidney was born and spent his first ten years: