Complex sentence: In 1874, Seward was elected to the New York State Assembly and once again served as Assistant Secretary of State under William M. Evarts from 1877 to 1879 during Rutherford B. Hayes' presidency.
Split into simpler sentences: In 1874, Seward was elected to the New York State Assembly. He served again as Assistant Secretary of State under William M. Evarts from 1877 to 1879 during Rutherford B. Hayes' presidency.