1. 21,989 names are listed in this index, most appear only once, but some are in two or three censuses. They are transcribed as they have been deciphered from the original census microfilmed pages. So, the same person can be referenced with different spellings, depending of the year of the census.
    
2. Only the family Names of Belgian born people are in the index.
    
3. The "Page" refer to the County/Division where you'll find that Name. The Page number is the one usually stamped on the microfilmed page, not the one you can find in the left corner of the census page, in 1860 and 1870 censuses.
   For 1850 and 1870, "a" and "b" pages were used, but not in 1860, except for some States, like Ohio. So, for 1860, the page number refer collectively or non-exclusively to the "a" or "b" page.
    
4. For the married women, it's the Name of the husband who appear in the list. 
    
5. All the 1850, 1860, 1870 States are available. New York Division,1870, 2nd enumeration, is not included.
    
6. The left index tabs 10 pages by 10 pages. You can refine your search from page to page with the arrows at the bottom of each page.
    
7. When you find something interesting for you, note the reference, this index is not linked with the transcribed pages.
    
8. With the reference you found, you have to go the hyperlink icon. There, is a clickable map and a list of the transcribed States. Follow either of those links from State to County to Division to see a transcription of the original census. 
    
9. There is a Picosearch tool linked with this index. It only give the web pages within this index.