The clue was not obvious at first, but get up close, stare hard and the naked eye will just make it out.
For those who do not eat their carrots, a little help:
At the point of dashing off a note to thank the Schoolboy for the many years of effort he has put into monitoring photographs like this one, doubt's whisper said it would be best to do some checking. Just as well, too. It turns out the Member for Midnight has a shutterbug namesake
Pity. Now we will all have to wait. The mystery of Thomson's rambles will be revealed sooner or later, with any luck in no more than a year or three.