What is the centerpiece on the table at dinner?

The centerpiece on the table at dinner consists of ten
china figures of indians.  As each of the guests meets their fate, a china figure
mysteriously disappears from the centerpiece.  After the death of the first guest, Tony
Marston, Vera makes the connection between the china figures, the verse from "The Ten
Little Indians" poem, and the manner in which Marston died. After the second death, Mrs.
Rogers, it is discovered that there are only eight china figures remaining in the
centerpiece.  This pattern continues as one by one, the guests meet their untimely
end.