come

What does 'come' mean here?

They were sitting beside the fire in the common room; the only other people awake were fellow sixth years. There had been a certain amount of excitement earlier when they had come back from dinner to find a new sign on the notice board that announced the date for their Apparition Test. Those who would be seventeen on or before the first test date, the twenty-first of April, had the option of signing up for additional practice sessions, which would take place (heavily supervised) in Hogsmeade.
Ron had panicked on reading this notice; he had still not managed to Apparate and feared he would not be ready for the test. Hermione, who had now achieved Apparition twice, was a little more confident, but Harry, who would not be seventeen for another four months, could not take the test whether ready or not.
“At least you can Apparate, though!” said Ron tensely. “You’ll have no trouble come July!”