Complex sentence: Educated at the Boston Latin School and at Harvard College, where he was graduated in the class of 1830 with a creditable record, he first studied law in the Boston office of Samuel Hubbard but never practiced law.
Split into simpler sentences: Educated at the Boston Latin School and at Harvard College, he was graduated in the class of 1830. Sargent studied law in the Boston office of Samuel Hubbard and then but never practiced law.