sentences:  The police calculated that in the previous few months alone, at least twenty children had been placed in the care of a "Mrs. Thomas", now revealed to be Amelia Dyer.It also appeared that she was about to move home again, this time to Somerset.This rate of murder has led to some estimates that Mrs. Dyer may, over decades, have killed over 400 babies and children, making her one of the most prolific murderers ever.