Question

why was the necessary to keep harold father's procession a secret for his?

Answer 1

Because if he get to know about his profession he will die because of shame that he is such an intelligent boy and his father is a professional boxer.

Answer 2

because his parent thinked that if Harold know the truth then this make the problem to his education.And they also think that if harold know the truth then Harold may be upset from his father's profession.