He Came... And Went

He Came... And Went is a side quest in the Fallout: New Vegas add-on, Old World Blues.

Quick walkthrough

 * 1) Talk to Dr. Dala about the "other visitor" at the Big MT.
 * 2) Find out the questions the other courier asked Dr. Klein.

Detailed walkthrough
After visiting The Think Tank and being introduced to Dr. Klein, Klein will tell the Courier to talk to the other doctors. Through dialog options, Dr. Dala will reveal that another courier traveled to Big MT, and that he was looking for another courier but hadn't found them yet. She can't recall the questions the other courier asked, but hints that Dr. Klein might know.

If the player speaks to Klein, he will tell the Courier that they asked a dangerous, possibly too dangerous, question. Klein states that he erased his memory of the event, but Dala hinted that some information might be written down somewhere.

Evidence of two of the visitors can be found at the Little Yangtze camp (Father Elijah's notes) and the Signal Hills transmitter (Elijah's journal page). Additionally, three holotapes of conversations between the other courier, Ulysses, and Christine Royce can be found in Ulysses' Point and the Y-17 medical facility.

Journal entries
Он пришёл... И ушёл