As the first chief and creator of the Police Intelligence Department, Sir Arthur Hastings' personal character naturally had a profoundly far-reaching impact on the operation style of this department.
Although he left this place three years ago, even today, the Police Intelligence Department still retains many old traditions from when Arthur Hastings was in charge.
Back then, in various archival documents and correspondence of the Police Intelligence Department, Sir Arthur Hastings often used the letter "A" as a pseudonym, which is the first of the twenty-six letters, symbolizing his primary position in the Police Intelligence Department. At the same time, A is also the first letter of "Arthur," so it can also refer to Sir Arthur Hastings himself.
And after Arthur left the Police Intelligence Department, his successors also referred to themselves as "A."
