describe j.'s experience of getting up early in the morning . ( in detail )

Basically he had his watch time wrong. Check out Chapter 11,

It was in the winter when this happened, very near the shortest day, and a week of fog into the bargain, so the fact that it was still very dark when George woke in the morning was no guide to him as to the time. He reached up, and hauled down his watch. It was a quarter-past eight.

“Angels and ministers of grace defend us!” exclaimed George; “and here have I got to be in the City by nine. Why didn’t somebody call me? Oh, this is a shame!” And he flung the watch down, and sprang out of bed, and had a cold bath, and washed himself, and dressed himself, and shaved himself in cold water because there was not time to wait for the hot, and then rushed and had another look at the watch.