As you exit Hyde Park in Westminster, you may pass through Victoria Gate. If you look into the yard on the corner, you will observe hundreds of tiny headstones, all lined up through the inner garden. It can only be a pet cemetery, and some of the clues are found on the headstones, if you can read them..
If you are not from the UK and are planning a caching trip to the UK email me via gc.com if you would like info about London caching, to have a local guide or to meet for a beer. Also have a look at the links below for lots of relevant information.