Hermanonie and Draco were excited and ran around outside. They looked at each other and said:
"Ra Ra for Hermandono".
They had found instructions to find the jar thief. He seemed to want to be found. He had left a series of coded messages.
They walked back to Green Group's room. They compiled their notes and it was like a poem that would potentially be their final clue to find the thief.
"Ye hath been trolled." It read.
They looked at each other and then the poem and then each other again. They had been trolled. They were mortified.
They didn't understand. How could it have happened? They solved the soot Morse code, they deciphered the singing of pipes and the taste of magic beans. All of their hard work had been for nothing.
Outside of the window (which was very large and extravagant because it was in Green Group's room) McDonaldall was on her broom, looking in at the miserable students, and she laughed.
"You called me a thief and I have made you fools!" She laughed as she flew away into the clouds at night.