Complex sentence: In 1853, he was appointed United States Attorney for Delaware, but spent only a year in the position before moving to Philadelphia to open a practice with his friend William Shippen, a partnership that would last until Shippen's death in 1858.
Split into simpler sentences: In 1853, he was appointed United States Attorney for Delaware. Bayard spent only a year in the position before moving to Philadelphia to open a practice with his friend William Shippen, a partnership that would last until Shippen's death in 1858.