Where was Harry Potter told to be when the arrived?

This question is a bit tricky, as it's not entirely clear what you're asking. It seems like you might be referring to the scene in the first book, "Harry Potter and the Sorcerer's Stone," where Harry arrives at Hogwarts for the first time.

In that scene, there are a couple of places Harry is told to be:

* "Meet me at the train station." This is what Hagrid says to Harry when he goes to collect him from the Dursleys. Hagrid specifies that he will meet Harry at King's Cross Station, Platform 9 3/4.

* "Be at the Hogwarts Express by eleven o'clock." This is a general instruction given to all students, though Harry, being new, is given this instruction specifically by Hagrid as well.

So, depending on what part of the arrival you're asking about, the answer could be:

* King's Cross Station, Platform 9 3/4 (where Hagrid meets him)

* The Hogwarts Express (where all students must be by 11am).

If you could clarify your question with more details, I may be able to give you a more specific answer.