What do you gather about Crocker-Harris from the play?

Explanation

Mr Crocker-Harris appears as a stem master who is a man of principles and stickler to the rules. He believes in fair assessment of his students and is not swayed by emotions, as the man is hardly human. He is not a sadist, but strict in the performance of his duties. Even on his last day at school, when he is over-busy in his own affairs, he does not neglect his duty towards his students.