Arthur was thoroughly satisfied with Pinkerton's academic performance. Hence, if Pinkerton hadn't been involved in the violent movement of the Charter Party, he should have followed the path Arthur had designed for him, passing through layers of selection to finally ascend to the position within the Home Office.
After all, it's well known that Sir Arthur detests leaving a power vacuum that other forces can exploit once he leaves his original position.
His personality dictates that he cannot allow the meticulously designed police system to collapse immediately after his departure.
And his nurturing of successors is not just mere support, but to ensure the continuity of this system.
From any perspective, he needs reliable successors, but what troubles Arthur is that most officers at Scotland Yard do not possess the capability to succeed.
