Meyrick soon returned to Russia. In 1603 he forwarded as a gift to the
Bodleian Library in Oxford, two Russian manuscripts: a bible and
Canones Patrum Muscov. In October 1603 his partner and brother, Richard, died in London, and John was described in the dying man's will as "then residing in Muscovy". After the death in 1605 of Tsar Boris, the utmost confusion prevailed in Moscow. An impostor known as
False Dmitry I seized the throne, but Meyrick obtained from him protection for English commerce, and when in 1606
Vasily IV became tsar, Meyrick was again successful in obtaining a renewal of the privileges previously accorded to his fellow-countrymen. Political disturbances compelled Meyrick to remove at times from Moscow to
Arkhangelsk and
Kholmogory, and late in 1606 he returned to England to report the progress of affairs. He was soon, however, again acting as "agent" in Russia, but paid another visit to London in 1611. In 1614 he was reappointed English ambassador to the tsar's court, with full powers to use his influence to reduce the anarchy prevailing in the Russian government. Before his departure
James I knighted him at Greenwich (13 June 1614). He travelled with forty-four people, and with a large sum of money to be advanced, if need be, to the tsar and his ministers. ==Mediation between Russia and Sweden==