Murray 's only son Matthew ( c. 1793 -- 1835 ) served an apprenticeship at the Round Foundry .
Murray 's only son Matthew ( c. 1793 -- 1835 ) went to Russia ; he founded an engineering business in Moscow , where he died age 42 .
Murray 's only son Matthew ( c. 1793 -- 1835 ) served an apprenticeship at the Round Foundry and went to Russia ; he founded an engineering business in Moscow , where he died age 42 .