Ancient windows

Exploration Stage: Burned-out Estate
From: Harper McGill
Description: Mr. Furnace Floor...why did you start talking about something so long ago? I want to know why the fire is so hostile towards the people in this house. I beg your pardon? Is there an answer in the oldest window? Okay, I understand. I'll look for it. Eli, are there any strange windows in this house?
Completed: The window frames are old and the windows themselves are made of mica. Thousands of years later, the hearth says, a hut was built over a cave where ancient people guarded a wild fire. This is its first window. They say it brings back images of the past. See this warm hearth fire? Oh, it's a wild fire!