A grim Victorian building on a hill overlooking the Herefordshire village of Weobley houses this lunatic asylum.

• Its superintendent is Doctor Charles Highsmith.
• Its staff included the Nurse Price, Nurse Evans and the orderly Frederick Long. It was later discovered that Evans was Montague Edwards in disguise.
• Its patients included Alexander Roby and Lucius Harriwell.
• It was the location of the murders of Cuthbert Yates, Frederick Long and Thomas Clarke.
• Doctor Frederick Bartlett visited St Agnes on a several occasions and was also accompanied by Captain George Withers on one of these appointments.