In December 1854, Commander Byron Drury, in HMS Pandora, surveyed the Sumner Bay, including the bar and mouth of the Avon-Heathcote Estuary for the Canterbury Provincial Council. Drury wrote a report and produced a detailed chart of the area, with soundings. Commander Drury's 1854 chart locates several buildings on shore, including a store at the foot of the hill in Clifton Bay, Day's house, which is set well back from the foreshore on a bend in the road, as it turns away from the foot of Clifton hill, and Dobson's house, which is shown at end of the spur at the foot of Richmond Hill. Compared to a modern-day map, the Day's house would have been near the corner at the top end of Nayland Street while Dobson's house would be near the intersection of Nayland Street and Wakefield Avenue.