During the summer of 1931 a set of air photographs was taken by Aerofilms, Ltd., under my instructions, covering the Roman walled town of Durobrivae and its surroundings, in the hope that marks in the crops might disclose the street system within the walls, as this had been very clearly visible from the air in the previous year. This expectation was not fully realized, although certain marks in the walled area appear to show some portions of the side streets which no doubt branched from Ermine Street in its straight course through the town, but very clear indications were given by the photographs of other Roman roads which connected with Ermine Street and with each other to the north and east of Durobrivae.