Complex sentence: In 1820 Sir Henry Hardinge was returned to parliament as member for Durham, and in 1828 he accepted the office of Secretary at War in Wellington's ministry, a post which he also filled in Sir Robert Peel's cabinet in 1841-1844.
Split into simpler sentences: In 1820 Sir Henry Hardinge was returned to parliament as member for Durham, and in 1828 he accepted the office of Secretary at War in Wellington's ministry. He was Secretary at War once again in Sir Robert Peel's cabinet in 1841-1844.