This is a photograph of the intersection of Holywell Lane and Curtain Road in Shoreditch, London. This location is where the Walbrook began in medieval London before it went onwards to Moorfields and down to the River Thames.
This image depicts the location where the Walbrook would empty out into the River Thames. It is located below the present day Cannon Street Underground Station, near Walbrook street.
This is a map of the City of London in 1300. This map demonstrates that the Walbrook begins a bit before Moorfields, extends throughout the middle of the City, and empties into the River Thames at Dowgate.