The Hidden Death revealed!

"Agent J reports: &, 1923, Hidden, cord for the shade, black dot on the H in monthly (I'm not sure if that counts!). That' all I can find!"

The accidental erasure in the H does not count but thanks for pointing out my mistake.  The last change to the cover the left shoulder of The Shadow's cloak.  However, I have to give you credit for 5 and declare you this weeks winner.