The clock from the town hall

An original narrative about an invented clock-repair workshop.

A heavy wall clock arrived at the workshop just as I was clearing metal filings from the counter. The visitor carrying it introduced herself as Leonie Marsh and carefully rested the clock against a cabinet. Its wooden case was scratched, but the glass over the clock face was unbroken.

Leonie explained that the clock usually hung on a bracket above the entrance to the town hall. It had stopped during the previous evening, so she had removed it before the building opened. As she left, she placed its winding key in an envelope and handed it to me.

Write down what the visitor put in the envelope and where the clock usually hung.