The sign has gone. Only a frame remains. Head northwest into the garden to find a rock at the base of a tree.
(TDC have put up a new information sign relating to the stream and pond life that is being encouraged to thrive in this waterway. Have a read and "smell the roses" or carry on for a quick cache.) We never knew that we had Tuna in our stream until we read the board. It might be a while before we see any Yellow Fin though.
The published coordinates will take you to where the sign used to be. From the here track on a bearing of 310 for 10 or 12 metres to find the cache.