That's a great picture of Notgrove-
http://www.themodernantiquarian.com/post/57425
I’ve never seen a photo of the chambers before, in fact I just spent a couple of minutes staring at it trying to figure it out, thinking it was Nympsfield.
Anyway, can I ask where you got it from and if you know when the pic was taken? I know Notgrove was excavated in the late 19th century and around 1935 so I’m guessing it was from the latter date. I wouldn’t mind pinching a copy for my own use.
Cheers-
-Chris