Right now my Twitterfeed is overflowing with excitement over the apparent discovery of a fragment of the Res Gestae in Sardis. Mary Beard actually broke the story at her blog an hour or so ago … here’s an excerpt:
Well a new article by Peter Thonemann in Historia 2012 puts the kibosh on that. Because he has realised that a tiny and otherwise insignificant fragment of Greek text published in 1932 in a volume of the inscriptions of the town of Sardis (Buckler and Robinson, 1932) was actually (as Buckler in an unpublished letter had already suspected) a small fragment of the Res Gestae. And Sardis is not in the province of Galatia, but in the province of Asia.
… you’ll want to read her whole article for what is being kiboshed and the Galatian reference:
That said, the Historia article is — as always — inaccessible to us poor peons whose coporeal forms do not penetrate the ivory walls of academe, but the standard collection of inscriptions from Sardis is available at the Web Archive … I’ve paged through it and can’t really find anything that looks res-gestae-ish, so perhaps it is in a supplement. Whatever the case, it would be interesting if some computer program could be written which compared the various collections of inscriptions found everywhere in the Greco-Roman world. I bet more fragments of the RG would show up (as well as multiple copies of other documents, I suspect).

According to the abstract it’s Sardis 7.1.210 (Buckler-Robinson), ergo this fragment:
— — —
[— — —]ιας ἔδωκα [— — —]
[— — —]ν τοῖς ἀρ[— — —]
[— — — τ]ρισκαίδε[κα — — —]
— — —
http://epigraphy.packhum.org/inscriptions/main?url=oi%3Fikey%3D263338%26bookid%3D533%26region%3D8
thanks … so that would be what is referred to as section 15 …
It seems that way. The hint may have been τρισκαιδέκατον, which is at 15.15 sq. The word ἔδωκα is also in there. They could be correct that it’s an alternative translation.
http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Augustus/Res_Gestae/3*.html#15
Sorry, it’s of course 201, not 210. Here’s a copy of the image — http://i46.tinypic.com/10qf4vt.jpg … taken from the raw scans of the article at archive.org (p. 155): http://archive.org/stream/pt1sardispublica07ameruoft#page/154/mode/2up