It shows he is arrogant because he talks just as much as Pickering.
Explanation:
"Pygmalion" is a play written by George Bernard Shaw.
Henry Higgins was a professor and the author of Higgins' Universal Alphabet. He is cold-hearted and rude though he was very educated. In Act 1, is the first time when the readers get to meet Higgins. He was sitting at the Covent Garden with others who were waiting for the rain to stop. He was sitting at the back of the crowd noting everyone and making notes.
On page 5, the character of Higgins is developed by picturizing him as an arrogant man as he talks so much. His conversation with Pickering reveals that he is a rude and arrogant man and not a gentleman as one would expect an educated man to be.
