In this study we illustrate how data sets, defined and set up independently in digital archive projects, can be linked to mutually enrich each other. The data linked are the digital tombstone archive ThakBong and the visionary use of the 1956 census by Chen and Fried 1 , published in 1968 as 'The Distribution of Family Names in Taiwan'. We explain, through which assumptions the dimensions of the two data sets can be mapped, so that values missing in one set can be completed by the second or, estimated values can be replaced by more reliable values. Conflicting values in both set trigger hypotheses concerning the validity of the data sets.introduction Visionary research allows for applications that few people had in mind at the time the research was conducted. When Chen and Fried worked in 1964 through millions of ten-year-old census sheets and produced a book filled on 969 pages only with numbers, who but the researchers might not have thought of a waste of time and money? Fifty years later, using a relational database and an intelligent