That's good. A peice of advice on that kind of writing. Its always going to seem apparent to you because your the writer and know what's going to happen. Another tip would be to only leave a max of 3 hints throughout the entire book, if you have too, otherwise leave none at all.
My second and third books were very much like that. And the entire time i was freaking out it was too obvious who the bad guy/s were but when i had someone read them it blew there mind.
Thanks. I feel so much better now. I've thrown in one hint that it could be him and gave several false hints toward the other character to where it would seem much more likely that it would be Jameson rather than Sir Walter.