Alyssa sprinted up to the Professor's Hut and started knocking on the door. Generally she would just knock, sit down and wait for the Professor to answer. But in this case, because it was the Headmaster who had sent her and because it was an emergency, she knocked and called out at the same time.

"Professor Williamson, Professor Williamson. Are you in there? Your presence is requested immediately." Alyssa called out, hoping that the Professor was in, and not out and about.