Where: By the frozen lake
When: Early morning
Barty Crouch, JR could not sleep, and at the first sign of daylight he left the castle. The morning air was cold and he could see his breath, but it did not stop the young slytherin.
He walked without destination, but ended up next to the frozen lake. He touched the ice with his foot, testing to see how frozen it was. He walked along the shoreline, listening to the winter birds sing.