It's not really important, I just never saw the letter H as much I have seen other letters stamped. I just thought someone may know of a list of of who the inspectors were out of curiosity not for anything else. Just a question, that's all.
The only lists of names I am aware of that have ever been published were the assembler and final inspector. Also, as employees left that position these numbers/letters were transferred to the new person that took over the job.