The greatest mnemonic devices for me, though, aside from the Sound Stone, are museums themselves, or libraries, or any of these new media which reproduce them and all they contain digitally–these treasure-houses which do not hoard up but freely pass on invaluable memories, the stories of events and artifacts we tell one another, transmitting them and their mass of meanings and interrelations from one generation to the next just as we hand down the books and heirlooms themselves.