Reverend Hugh Macmillan was a 19th century Scottish pastor who lived from 1833 to 1903. Aside from his pastoral vocation, Macmillan also seems to have had a deep love and knowledge of botany, geology, geography, and the spiritual nature of human beings. He has several published books, such as Bible Teachings in Nature, The Christmas Rose & Other Thoughts in Verse, The Olive Leaf, and The Sabbath of the Fields: Being a Sequel to Bible Teachings in Nature, all of which show the connection between the nature of earth and its people, and their shared creation by God.