Complex sentence: He received his early education from Columbia Grammar & Preparatory School (then known as "Columbia Grammar School") and in 1838 he graduated from Columbia College with high honors, having served as president of the Philolexian Society.
Split into simpler sentences: He received his early education from Columbia Grammar & Preparatory School (then known as "Columbia Grammar School"). In 1838 he graduated from Columbia College with high honors and served as president of the Philolexian Society.