They were caught after Walters raised the suspicions of her landlord in Islington who was a police officer. An unknown number of babies were murdered this way, although the figure is considered to be in excess of a dozen. During their trial at the Old Bailey, the quantity of baby clothes found at Claymore House was used as evidence to indicate the sheer scale of their crimes. A local campaign to have their sentences commuted to life failed, and they became the first women to be hanged at Holloway on 3 February 1903, by William Billington, in what was the only double-hanging of women to be carried out in modern times.