

Indexing by name is crucial to cracking the until-now closed book of that year's census, which by law could not be released for 72 years and is therefore the most recently available one. When the census was first released, "if you didn't know exactly where someone lived in 1940, you couldn't find them," Braverman said. "That's the exciting aspect about this - the ability to search the lifetime of our mothers and fathers," said Debra Braverman, a New York-based independent forensic genealogist with clients seeking information for trust funds and estates.

Census experts say the New York data is of national interest because tens of millions of Americans have roots in this gateway to the United States through Ellis Island, and many can now dig for more personal information.
