Where was Cleopatra's signature found?

Dr. dig responds:
The papyrus text with Cleopatra's signature had been recycled for use in the construction of a cartonnage mummy case found by a German expedition at Abusir in 1904. It was common practice in ancient Egyptian times to recycle old papyrus and use it for wrapping mummies. In fact, many Egyptian texts have survived because of this practice, and it is one reason that we know so much about ancient Egypt.

But I do not know whose mummy the recycled text was used for.