There is a very nice article on the history of Solstice Canyon in an article written by a Pepperdine University Student in 2005. It can be found at this web address.
http://faculty.pepperdine.edu/kwaters/travel/travel08.htm
The response in the above video of this short Echovox session is "He's in there, he's right here" This was a direct response to my question which makes it very interesting.