On the third day, after a long wait, the anxious Vita Rosier finally discovered the exact location of Grindelwald and the Nurmengard Castle.

The information came from a distant relative of the Rosier family, a platinum-haired man obsessed with making money, who was recently opening up the international wizarding market.

Dumbledore was at the school those days to hold a board of governors meeting.

He had to handle various board matters, including next year's teacher arrangements and funding applications, and also face a more challenging task—how to conceal Nurmengard Castle.