When someone wants to visit me at the Conde Nast Headquarters, they show their ID to a security guard who then calls up and says "So and So is here." Strangely, the two times that Evan visited me in July, the guard called up and said "Donald Evans" is here.
Now, it might just have been an error. Evan Donald Ratliff is our vanished man's full name, and the guards could have misread his license. But maybe, just maybe, Evan was dropping a hint about a future identity. Or maybe he had already created an identity and handed the guard the wrong card. I really don't know. When I mentioned it to Evan he just laughed.