Robert Mueller has obtained emails from author Jerome Corsi that shows he had advance knowledge about the release of stolen emails damaging to Hillary Clinton and communicated with Roger Stone about the release of the documents.

Mueller’s team said that Corsi was in communication with Stone, an adviser to President Trump, during the 2016 campaign and that Stone asked Corsi to contact WikiLeaks about the dissemination of the hacked emails, according to documents obtained by The Washington Post.

“Word is friend in embassy plans 2 more dumps. One shortly after I’m back. 2nd in Oct,” Corsi wrote in an email to Stone on Aug. 2, 2016. “Impact planned to be very damaging.”

The email was sent 10 weeks before WikiLeaks began to publish emails hacked from Clinton aide John Podesta.

According to the documents, Stone encouraged Corsi to contact WikiLeaks founder Julian Assange and obtain information about the email leaks.

“Get to [Assange] [a]t Ecuadorian Embassy in London and get the pending [WikiLeaks] emails,” Stone wrote to Corsi on July 25, 2016.

Corsi then forwarded that email to Assange.

It was not clear whether Stone had relayed the information to then-candidate Trump.

The emails from Podesta were stolen by Russian intelligence agencies, the CIA has concluded.

Mueller’s special counsel probe is attempting to determine whether the Trump campaign colluded with a foreign power who was meddling in the election.