So far I have described the way in which an individual's message - a love poem, a single, discrete, spoken message - would be unlocked through the Echoing Tree. Of course at a given moment there would probably be more than one visitor to a garden, so each landscape would need to enclose a number of Echoing Trees. Within the wooded area of a garden there might be a dozen-or-so of these trees spread amongst the natural growths. A garden might also contain several such wooded areas - their exact number and position determined by the size and location of the landscape in question. So although the Echoing Tree is designed only to replay one message, for one person, at one time, there could - at any given moment - be dozens of personal messages being simultaneously relayed to different Keyholders, each sitting under a different tree.

Returning to the forest path, having heard a message, a visitor might also encounter someone else making their way to or from another Echoing Tree. A natural opportunity arises for individuals to acknowledge each other but walk on, or to strike up a conversation - perhaps even talk about their experience of visiting the garden. These chance (rather than random) events are one of the reasons that the architecture of Garden is considered to be a `living' space.