I leave a trail of breadcrumbs to show you where I've been (John/Sherlock, PG)

Title: I leave a trail of breadcrumbs to show you where I've been
Characters/pairings: John/Sherlock

Rating:PG
Spoilers: S2, Reichenbach Fall 
Warnings: a moment of gore, apparent character death
Summary: John sees him every single time he closes his eyes.
Author notes: This story is set in the Touchstone universe found on AO3 or LJ. To understand this story best, I recommend reading 'Touchstone' first.  I plan to revisit this universe to retell the three episodes of Series 2 through the 'Touchstone' universe's lens.

This ficlet demanded writing first, so here it is.

Beta thanks to pyjamapants, sc010f, and bethbethbeth.

( I leave a trail of breadcrumbs to show you where I've been )