In any event, the molluscs and scavengers did not consume everything organic. Some of the wooden objects on the ship and in the debris field have not been consumed, particularly those made of teak, a dense wood that seems to have resisted the borers.[113] The first-class reception area off the ship's Grand Staircase is still remarkably intact and furniture is still visible among the debris on the floor.[114] Although most of the corridors have lost their walls, furniture is still in place in many cabins; in one, a mattress is still on the bed, with an intact and undamaged dresser behind it.[115] Robert Ballard has suggested that areas within the ship or buried under debris, where scavengers may not have been able to reach, may still contain human remains.[116] According to Charles Pellegrino, who dived on Titanic in 2001, a finger bone encircled by the partial remains of a wedding ring was found concreted to the bottom of a soup tureen that was retrieved from the debris field.[117] It was returned to the sea bed on the next dive.[118]