Why are there no primary links for Chinese or American Indians?
We do not include any primary links for races other than black and white. Although there were a fair number of Chinese in the United States in 1880, the high level of name homogeneity (and assumed age imprecision) made linking this population impractical. Few American Indians were present in the 1880 census, which meant that we would have been able to make relatively few links to subsequent censuses.
