When Jeffreys left in April 1853 , Armstrong was promoted to Locomotive Superintendent .
In 1847 Armstrong was appointed assistant locomotive superintendent to Edward Jeffreys , on the Shrewsbury and Chester Railway ( S&CR ) , whose repair works was at Saltney .
When Edward Jeffreys left in April 1853 , Armstrong was promoted to Locomotive Superintendent .
In 1847 Armstrong was appointed assistant locomotive superintendent to Edward Jeffreys , on the Shrewsbury and Chester Railway ( S&CR ) , whose repair works was at Saltney .