Edward Collins
From Jack the Ripper Wiki
Reserve Police Constable Edward Albert Collins, 12HR.
Born 1847. Joined Metropolitan Police in 1873 (warrant no.56929), subsequently transferred to reserve.
Accompanied PC Henry Lamb to Dutfield's Yard after Lamb was alerted to the discovery of Elizabeth Stride's body by Morris Eagle in Commercial Road at a little after 1.00am, 30th September 1888. Collins was sent to fetch Dr Frederick Blackwell from his house at 100 Commercial Road, and returned to the scene with Edward Johnston, Blackwell's assistant.
At 5.30am, PC Collins washed the blood from the yard[1]. He also stated that there was no traces of blood on the walls.[2]
Collins has also been called constable 426H (by Lamb)[3] and 436H (by Johnston).[4]