I remember how another character in Sherlock used a mind palace, Magnussen, in season 3 episode 3 and it was impressive.

You talk about being creative and I think the key is to imprint it with emotions. There's research that tells us that events with high arousal are remembered better, so when it comes to creating your mind palace, your creativity will nurture it with feelings that will make your mind palace a very clear virtual space.

Thanks for sharing, it's a very interesting subject!