The Reference Desk/Information from The Gods Walk Among Us and The King of Golden Death sought

If you respect the archaeologist River Song as much as I do, it feels fair to date her stories to a T, even if it means some extra effort. I would like to do just that for the audio story The Boundless Sea. It is said to take place the next year after the tomb of Tut-Ankh-Amen was discovered. What I am searching for is the information about the year of that discovery in the DWU.

The two stories in the title seem to be the ones most likely to contain that information. Unfortunately, I do not own them, so I am asking for assistance in finding out. The Gods Walk Among Us takes place in 1926. It mentions the discovery of the King Tut's tomb, but it is not clear from the Wiki page alone when that happened. Sure it is reasonable to infer that it was recent, say between 1920 and 1926. But is the actual year of discovery (1922 in the real universe) stated? Please help.