Hi, If you wish to know who lived at a certain address in 1901 or 1911, go to nationalarchives.ie then browse (instead of search) . For example, if you want to know who was living at 111 Townsend street, click on browse at the top of the page, then click either 1901 or 1911, then click on Dublin, then Trinity+then Townsend street, scroll down to 111. Then check dublinheritage/electoral roles to check if any Family were still there in 1939. Maggie