[ WP ] What if ghosts are , in reality , glimpses of time travelers ?

The concept was staggeringly simple. We knew how to travel in 3 dimensions. Now we knew how to travel in 4 dimensions. Simple. 
 
 But just like a 3D object moving in a 2D world would appear and disappear in 2D slices or'layers', a 4D movement in our 3D space would appear in 3D'slices' or'layers'. So either a layer would be or not be. Translucent layers, entities, presences - nope. 
 
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 Of course, I could be shooting hot air out of my ears and blabbing nonsense out of my mouth - but I am afraid it is not so. 
 
 You see, I have fulfilled my time in your time, and now I must return. However, do not let this discourage you, as the earliest I could travel to was anytime *after* you had invented your 4D traveller on your own. 
 
 Adios!
