Gathered from source material found in the Heritage Hall archives at Calvin Seminary and University, these are the earliest notes of Vos’s lectures on natural theology. They demonstrate his understanding of Reformed orthodox approaches as well as extensive knowledge of contemporary developments in the subject. The present volume could be regarded as, and may have formed, a partial introduction to Reformed Dogmatics since it lacks a prolegomenon and because Natural Theology discusses religion and the proofs for the existence of God.