BOSTON (AP) — is making available online for the first time tens of millions of wills and probate records from ordinary Americans to the nation's most famous citizens.

The massive of trove of information that before had been buried in courthouses throughout the nation is sure to be an invaluable resource to historians and professional genealogists, as well as to people who just want to research their family history. Experts say wills provide fascinating insights into family relationships that can't be found in most historic records or history books.

For example, patriot Paul Revere left his grandchildren $500 each, except for one grandchild — who got just $1. The records are available on starting Wednesday.