http://gravelytalk.com/
A site with a private Gravelyforum, pictures and links

http://gravelyinfo.com/
 It's what it sounds like, a lot of Gravelyinformation

http://www.stevenchalmers.com/Gravely/Gravely.shtml
Lot of old advertisments pages, sales flyers and pictures

http://www.oldgravelys.net/docs/
A huge collection of Gravely manuals in Pdf-format

And now....
something completely different, yet interesting for many people, I think!
My neighbor's site, only in Swedish but many pictures.
www.htj1.com