Complex sentence: In 1909 he was returned to Parliament for Hawick Burghs, a seat he held until 1918, and served as Parliamentary Private Secretary to Prime Minister H. H. Asquith from 1910 to 1916.
Split into simpler sentences: In 1909 he was returned to Parliament for Hawick Burghs, a seat he held until standing down in 1918. He served as Parliamentary Private Secretary to Prime Minister H. H. Asquith from 1910 to 1916.