Maybe some of my more nerdy friends can help me out here. It's common Fallout knowledge that Richard Moreau was a Doctor in Vault City and was banished. He then changed his name to Richard Grey and ultimately became the Master. (As told by Harold and "Richard Grey's Audio Diary")

My question is can anyone tell me where it's actually stated that Richard Moreau became Richard Grey? Lynette in Vault City says that they banished a Richard Moreau, but I can't remember/find where it says that Moreau changed his name to Grey and headed south. I know it's written in the Fallout Bible, but is that the first time we see it or can you find evidence of it in a game?

I just want to know where it's first stated that Richard Moreau became Richard Grey.

Thanks in advance!