Just to clear up the point, the position of the house was determined on the map by counting from the corners of the roads near it ,using directories of 1876.80 and 90. In all of these the numbering was the same. In 1873 and before the houses were not numbered, at least in the directories. what usually happened was that renumbering changed numbers from 1,2,3 --- down one side of the road and then back down the other, to a system of odd nos one side, even the other. I think this occurred when Edwardes street became edward road, which would have been about when bridge was built. Before it was a dead end street, and it was reasonable to do numbering the first way, but seemed more reasonable with a through road , presumably, to have the other numbering system. In this case it was possible to accurately deterine the house, as .f rom the directories you can definitely say which one it was . this is not always possible
mike