This paper discusses how Demolink an interactive record linkage was used for record linkage in a large Norwegian parish for the period 1801-78. It is noted that this system resembles earlier semi-automatic systems in some respects the most important of which is that the linkage decisions are taken by the historian and not by predefined computer algorithms. The main new feature of the method is the possibility of linking from more than two historical sources simultaneously subsequently improving the process of sorting out which events belong to which individual life courses. Its main disadvantage is the time required to accomplish the linkage. Used on data from censuses church books and land registers from the parish of Asker and Baerum Oslo the purpose is to study various aspects of demographic behavior in the past. Overall linkage results in terms of name frequency was found to be a problem even with an interactive system like Demolink. On the other hand in terms of social group Demolinks interactive linkage of records from all the sources simultaneously has given good results.