Original sentence: Menzies' friendship with Kirill Naroshkin, who was now the Tsar's father-in-law, and Patrick Gordon and others place him close to Tsar Alexeui and until the Tsar's death he instructed his son (the future Peter I) on military matters
Edited sentence: Menzies' friendship with Kirill Naryshkin, who was now the Tsar's father-in-law, and Patrick Gordon and others place him close to Tsar Alexei and until the Tsar's death he instructed his son (the future Peter I) on military matters