This story has survived through the ages thanks to the appropriately named Famine Stela, a inscription found on Sehel Island near the city of Aswan, once the main southern frontier of Egypt.
That means that the memorial was placed in the church while Shakespeare's wife and children were still living, and presumably they would have approved of the inscription and the statue.
More lines of the Eridu tablet are missing here, but it is assumed that it would then detail Ziudsura's creation of a large boat, which he filled with animals and the seed of mankind.
I mean, there's no actual inscriptions or anything like that, anything tangible, but he's mentioned not only in the Christian Gospels, but also in the works of the Jewish historian Josephus.