My skepticism about SBTC and JMK had to do with the fact that the phrase "...saved by the conquerer..." was just lifted out of the middle of a sentence as opposed to being a stand-alone sign-off. So, I thought about that and wondered what would happen if I randomly grabbed a book off the shelf and looked for the same acronym appearing in a phrase embedded in any sentence. Surely by page 400 or so I would find a match. In fact, by page 21 I had one. I think this was just a coincidence. I was willing to accept that it *could* have significance but I also realized it might just be coincidence.
If we find this phrase somewhere else, say in a letter to his ex-wife, then I could see that it is something more. But to date I haven't seen a document like that.
BTW, I would encourage others to try the same thing and see what you get. It won't take long.
Oh...I agree with you on the "Shall be the Conquerer" phrase. If the ex had letters that were specifically signed with SBTC, that would raise my suspicions. I don't know that any have been produced.