This letterbox hybrid cache is not at the posted coordinates, but this is a good place to park and start your adventure.
Pochtovyy yashchik is the Russian term for letterbox. Welcome to this new series of London Letterbox caches honouring many different countries and languages around the world. This cache contains a stamp that is not a trade item and should remain with the cache.
From the listed coordinates, you will be hiking west along the path and then alongside the pond. You can find the final cache coordinates by projecting a waypoint 208 m away, at 263 degrees true.