Confirmed: these messages are being broadcast to this computer from the Dark Aether. The Stranger is attempting to establish communication.
Document Text:
Day 13, 784: Very big development today! Passed through another weak spot and found a device set to frequency I use for broadcasts. My previous transmissions were right there on screen! No longer feel like I am talking to the void.
When I got pulled back here, I set my transmitter to indicate if receiving device has been used. Waiting now for any sign that someone is on other end.
Feels strange, after all this time, having something to look forward to.