The Luteces are introduced as two mysterious individuals that take Booker on a boat to a lighthouse that enables airborne transportation to the floating city of Columbia. From then onwards, both individuals became the center of numerous odd phenomena encountered throughout Booker's travels in Columbia. They appear seemingly at random, often compelling the player through Booker to make seemingly trivial choices or providing cryptic advice about current objectives. In an early scene, they ask Booker to flip a coin, which has come up heads 122 times out of 122 flips, evidenced by tally marks on both sides of the sandwich board worn by the gentleman Lutece. The player may also collect portable voice recording devices called voxophones which contain personal messages from Rosalind at various locations. These recordings provides insight into Columbia and its mysteries, and allows players to deduce the extent of their involvement by piecing the audio logs together.