So I have an old man in my novel. He is quite formal, and refers to people as Mr. Here is my question. When the prose describes him, for example, "Mr. Francis poured the tea," I use an abbreviation. But someone recently pointed out that I should not abbreviate in real speech. "Mister Francis! How do you do?" It looks a bit odd to me, to see the mixture of Mr. and Mister. Anyone got a view on this? I am mired in indecision….