I found this site a few months ago and forgot to post it, it has some interesting information if you are into silent films, or even films in general.
http://www.silentera.com/index.htmlThey post some great information about the releases and if it was on LD at one time.
I know there aren't that many on this site who have interested in silent films but I do hope this site helps if you didn't know about it already.