The Internet Archive also said Ms. Reid’s lawyers asked the group to take down the archived version of her site in December because they said either the archive or the original site had been hacked.

The archive said it was warned by Ms. Reid’s lawyers that “‘fraudulent’ posts were ‘inserted into legitimate content’ in our archives of the blog.” But an investigation found that claim to be untrue, according to the archive.

“When we reviewed the archives, we found nothing to indicate tampering or hacking of the Wayback Machine versions,” the statement said, adding, “We let Reid’s lawyers know that the information provided was not sufficient for us to verify claims of manipulation.”

The Internet Archive said it declined the request to remove Ms. Reid’s blog from the archive “due to Reid’s being a journalist (a very high-profile one, at that) and the journalistic nature of the blog archives.”