As they listen, visitors are welcome to open the mailboxes to listen more closely to the individual sounds. In doing so, they encounter letters and flyers received by Neukölln residents, including credit card statements, flyers for moving companies, letters from landlords, and utility bills. These documents — inconsequential or threatening, now faded to the point of near illegibility, familiar yet untraceable — reinforce the role of mailboxes as silent witnesses to our dwelling.