The
Yesipov Letopis is the principal source. There are two versions; the Mirovich version was printed in the 1907 volume and belonged to Pyotr Mirovich, who helped
Gerhard Friedrich Müller find the manuscript in
Tobolsk. Müller handed it to the
St. Petersburg Academy of Sciences in 1744 and called it the
Tobolsk Chronicle. It was first published in
Opisaniye Sibirskago tsarstva in 1750. The Mirovich version contains illustrations. Although it is undated and appears to be unsigned, it is known to have been written by
Semyon Remezov, the son of a Tobolsk noble. A letter code in the last paragraph says "written by Semyon Remezov" when solved. ==References==