200th puzzle cache
I only noticed this a few weeks ago and solved the first part very quickly as I vaguely remembered reading something about the watercolour and the song. A bit of research confirmed the sons's identity and thus a likely looking set of co-ordinates were revealed.
Today I was fairly close by and decided to divert to get the second set of numbers. These were easier to find than I expected and so we soon had the final co-ordinates. We then had a short walk and a fairly easy find. Nice area.