Rich non-intrusive recording of a naturalistic conversation was conducted in a domestic setting. Four (sometimes five) participants engaged in lively conversation over two 4-hour sessions on two successive days. Conversation was not directed, and ranged widely over

topics both trivial and technical. The entire conversation, on both days, was richly recorded using 7 video cameras, 10 audio microphones, and the registration of 3-D head, torso and arm motion using an Optitrack system. To add liveliness to the conversation, several bottles of wine were consumed during the final two hours of recording. The resulting corpus will be of immediate interest to all researchers

interested in studying naturalistic, ethologically situated, conversational interaction.