Such adaptations & continuations by another hand are always full of such "as if"s and "I think not"s. Another recent instance [drift but IMO not too far]:-

One of Jill Paton Walsh's post-Dorothy L Sayers Wimsey novels has His Lordship carrying a pack of visiting cards reading "Lord Peter Wimsey, Private Detective"!; and Bunter calling him "Peter"!

As if! I think not!

~M~