The Aiken books are revealing all kinds of hidden gems including one game v W.H. Cozens (alas not a King Hunt)
which is a very rare find indeed. chessgames.com never even had a Cozens page till I sub'd them the game.
One game in Aitken book 14 has myself, John and Alan McGowan stumped.
(though between you and me, the three of us love a good chess mystery.)
Obviously some kind of correspondence game from December 1952- June 1953.
But who or what is HSR and HJL

Aitken also kept a separate index of his games and here is the index 'H' entry. date is 1952-1953.
You will notice Aitken has marked it '1' so what ever this is he won or was on the winning side.

Aitken lived in Russell Square, London when it was started and moved to Cheltenham in 1953.
He tells us on the bottom of the score that on the 28th April 1953 v Jim Adams which is game 657,
(the game before the mysterious 658 was entered ) this was his last game in London before moving to Cheltenham.
Anybody any ideas? I have a feeling I am missing something obvious but cannot quite nail it.
The full game:
