It takes a while for Cain to see the message, even with his (now less and less common) insomnia. He doesn't usually bother with the tablet this early in the morning, feeling not quite like himself until he's had coffee.

Finding Mister Draper's message on there doesn't help matters. Of all the people here, it seems more and more like the people he cares about are the first ones to go.

I'm sorry to hear it.