Zoom in and look in central Canada to the right of the clouds. You will see a letter "J". I discovered this myself. So if Rene can have his C-rock, by golly, I want credit for my J-continent!
I think you'll have to talk to HRH Elizabeth II for that one.
Speaking of "J", Jay, if you have this somewhere on Clavius, I'm going to be seriously upset!
Fear not, it's your original discovery. If I decide to report it on the relevant Clavius page, naturally you get credit. Well, for the photographic discovery anyway, not necessarily the alleged land mass.

Bennett and Percy go on to claim that in addition to the C on the rock, there's also a C on the ground in front of the rock. The Aulis authors and Rene both argue NASA "airbrushed" the C out of subsequent releases of that photo, but Aulis (Bennett and Percy) go on to argue that the C on the ground confirms that the rock allegedly marked C was meant to be placed there. So in refuting that, I note that in the C-rock photo -- if you want to stick with pareidolic letter identification -- you can see a whole lot more "letters" in the texture of the lunar surface.
So in a sense I've possibly stolen that bit of thunder.
Anyway, now that I've pointed this out, I'm wondering if it is the same photographic phenomenon as the "C", (lint getting into the photo-reproducing process.) There's a lot of debris floating around the craft. Is it possible that some string-like object near the CM might be causing this?
There is indeed a lot of debris; this photo was probably taken not long after transposition and docking. It could be debris outside the spacecraft, or as with the C-rock photo, post-flight contamination of the transparencies or prints.