Just as it could have been that person who was currently blackmailing him, it was just as possible that such a person was being used to pass on the letter to him.
It was not like he was in a position where he could go looking for answers to those questions, even if he did conclude that such a person was the one who had blackmailed him.
They held his weakness in their hands so he could not risk upsetting them.
If it were possible that such a person had been a messenger and had nothing to do with it, then it would give him no answers, and he would risk exposing that he was doing something that he should not be doing under his present circumstances.
He could only keep going around in circles as he tried to recall everything that he could while trying to figure things out.
