تاريخ روسيا
In 1755-56 he was Lomonosov's personal secretary, and in this period he wrote "A Brief History of Russia", which was published in 1762. In 1759-60 he edited the medieval "Nestor's Chronicle" for publication. In 1756 he was dismissed from the Academy for drunkenness and insubordination, after several reprieves, and reinstated until final dismissal in 1766.