The second installment of emails from Hillary Clinton's private home-brew server, released Friday by the State Department, includes 41 messages that reviewers determined contained classified material.

Clinton claimed four months ago that her server, which she kept in her Chappaqua, New York home and used exclusively throughout her four-year tenure as secretary of state, never housed classified material.

That assertion began unraveling in late May, when a single message she sent was retroactively classified 'secret' – the second-highest level of classification – by State Department inspectors.

Friday's dump of more than 1,300 messages upped the ante considerably, although the 41 messages appear to all have been classified as 'confidential, which is one step lower.

SCROLL DOWN TO READ THE CLASSIFIED EMAILS

I DID NOT ... SEND ... CLASSIFIED INFORMATION: Emails released Friday from Hillary Clinton's private, unsecured email server include 41 messages now considered classified by the State Department

'I did not email any classified material to anyone on my email,' Clinton told a massive gathering of story-hungry reporters during a March 10 press conference at the United Nations headquarters in New York, shortly after the existence of her private email server was uncovered.

'There is no classified material,' she said then, 'so I’m certainly well-aware of the classification requirements and did not send classified material.'

Clinton spokesman Nick Merrill said in a statement to Reuters a week ago that the Democratic presidential candidate 'followed appropriate practices in dealing with classified materials.'

While Clinton has relied on her fact that nothing she sent or received on her private email account was officially classified at the time, questions remain about the wisdom of high ranking government officials communicating outside of the secure channels that cost the United States billions of dollars to set up and maintain.

Clinton never had a 'state.gov' email address, even though she was the State Department's most senior diplomat for four years.

The material from her emails that the cabinet department classified before releasing on Friday includes a wide range of sensitive information reaching across several continents.

One message concerned information then-Assistant Secretary of State for Near Eastern Affairs Jeffrey Feltman wanted Clinton to have before she took a phone call with Palestinian Authority President Mahmoud Abbas.

Feltman is now the United Nations Under-Secretary-General for Political Affairs.

Another revolved around discussions about the need for a phone meeting with Soviet Foreign Minister Sergei Lavrov, and cited an intelligence assessment about the Republic of Georgia provided by the European Union Monitoring Mission.

Still another message contained a State Department 'readout' – a summary – of an August 2009 meeting between then-Senator Jim Webb of Virginia and Burmese opposition leader Aung San Suu Kyi.

That summary was marked 'SENSITIVE BUT UNCLASSIFIED' at the time Clinton aide Huma Abedin forwarded it to her. The agency has since decided that designation was insufficient.

Webb, who left Congress in 2013, is now among Clinton's opponents for the Democratic presidential nomination.

Another now-classified message concerned unspecified back-channel communication with Afghanistan's then-president Hamid Karzai in the months leading up to his 2009 re-election.

Others focused on the internal politics of Honduras, planned meetings with diplomats from the United Arab Emirates, and preparations for a conference on the Comprehensive Nuclear Test Ban Treaty.

In most cases, Clinton herself was merely a recipient of information – not the sender. If she had been using a secure State Department email address, the chain of communication might have been unremarkable.

But in at least one instance, she used her private email account to reply to a now-classified message with one of her own.

That exchange, with Bill Burns, then the undersecretary of State for political affairs, concerned the U.S. government's perception of the relationship between Russian president Vladimir Putin and now-prime minister Dmitri Medvedev.

'Moscow preparations are in reasonable shape,' Burns wrote Clinton in a section that comes before the passage that is now classified.

'Afghan lethal transit agreement is done, and will be signed on Monday. There's also a broader statement on cooperation on counter-narcotics and reconstruction in Afghanistan.'

Clinton responded by asking for 'periodic updates, especially your impressions of the Medvedev-Putin relationship.'

'I am considering a trip to the Caucusus and Central Asia in the Fall, perhaps attached to the Russia bilat[eral meeting], if we decide that makes sense.'

'As you know,' she continued in her unsecured email, before describing something sensitive enough to be censored before it was released to the public on Friday.