At least one of them was still in the chamber above.
The man she had seen was still in the chamber.
She was not the only other person in the chamber.
The girls had already done so, and were in the next chamber.
"Does he know anything about what happened in the chamber today?"
How else could they end up in the same chamber with us?
They had been in the chamber for two hours now.
He sat in the Chamber for 12 years until 1890.
They were in a chamber, and something was going on.
He turned away and left us alone in my small chamber.