"We, and the Ministry, are placing a great deal of trust in you. Not that there's a whole lot that can be done with it, you see, but you could still travel about four hours forward or backwards. Any more than that would cause undue risk to your person. It is strictly to be used only to attend your classes. Are we clear?" The wrinkles around Professor McGonagall's mouth creased further, and she glowered over her folded hands at Hermione.