"The wolfsbane potion takes a long time to brew and is a very complex potion that can have disastrous consequences if not brewed properly. I will be busy with this for the next two months. The second reason that I will not be near this house on your birthday is because Albus is going to be sending someone from Hogwarts to talk to the Dursleys and take you to get your school shopping finished. His name is Rubeus Hagrid, and he is the groundskeeper at Hogwarts. I will come to visit you sometime in the beginning of the next month and when I leave, I will have to take all those books that I gave you."