These are Holmes's thoughts on the train out of England, as best as I can represent them.
I watch Watson as he sleeps, head resting against the window. He has loyally followed me this far, but is it really fair for me to ask him to continue? I know that he will come with me as soon as I ask, and probably will come even if I don't ask. He is my faithful friend.
Is it fair to ask him to come this time? Moriarty is a criminal unlike any before. This could be very dangerous, and though I am willing to risk my life to rid the world of him, I am not prepared to risk Watson's.
He has a wife waiting for him back in England. Though I dislike her for taking Watson away from Baker Street, she is truly fond of him, and I must respect her. I will not allow Mary Watson to be widowed.
Having resolved that, I should tell Watson to go home, and leave me, but I cannot. I am selfish, I know, but I cannot let my only source of comfort leave. Without Watson, I should sink into a pit of the blackest despair. I must not allow that, not with Moriarty so close on our trail.
I know that Watson would not leave my side even if I did ask. What man could be more faithful than my biographer?
