The cache of email records that Clinton sent the State Department late last year, totaling 55,000 pages, begin on March 18, 2009, with the emails from the [email protected] address. (Clinton, her aides have said, no longer has access to two months of messages from the AT&T BlackBerry account.)

But this week, as first reported by the Associated Press on Friday, State Department officials were provided copies of an email chain showing that Clinton used her [email protected] account as early as Jan. 28, 2009.

The thread includes messages between Clinton and David Petraeus, then commander of U.S. Central Command. The back-and-forth begins on Jan. 10, 2009, and ends on Feb. 1, 2009 — about a week into Clinton’s tenure as secretary of state.

As described by a State official, the chain includes fewer than 10 emails total between Clinton and Petraeus. The emails from Clinton begin on the AT&T BlackBerry account and, the official said, “about halfway through the chain,” starting on Jan. 28, the correspondence switches to the [email protected].