This checkin to GC56KEX The Bate Collection of Musical Instruments reflects a geocaching.com log entry. See more of Dan's cache logs.
With a difficulty rating of 2/5 I thought this would be a reasonably easy puzzle, but I guess my poor heat-addled brain isn’t up to the task. I thought that perhaps visiting the Bate Collection early this afternoon might help, but it turns out that they only open at 2pm in the afternoon (by which point I had to get back to work), so I’ve not had any luck yet! Some day, perhaps!
But be warned: if you plan to visit the collection, they don’t open until 2pm on weekdays.