“I, Julian Assange, hereby grant full authority to my friend, Israel Shamir, to both drop off and collect my passport, in order to get a visa,” said the letter, which was recently obtained by The Associated Press.

The Nov. 30, 2010 missive is part of a much larger trove of WikiLeaks emails, chat logs, financial records, secretly recorded footage and other documents leaked to The Associated Press.

The files provide both an intimate look at the radical transparency organization and an early hint of Assange’s budding relationship with Moscow.

The ex-hacker’s links to the Kremlin would become increasingly salient before the 2016 U.S. presidential election, when the FBI says Russia’s military intelligence agency directly supplied WikiLeaks with stolen emails from Hillary Clinton’s campaign chairman and other Democratic figures.