HEBRON — Author Mary Cowan recently detailed to the town’s historical society the life of Donald Baxter Macmillan in her book “Captain Mac”. From 1908 until 1954 he spent nearly 50 years with over 30 trips exploring the Arctic. Growing up near the ocean and orphaned by 12, he forged an adventurous life and even played a vital part in Robert Peary’s North Pole expedition. In his journeys he also became deeply involved in the cultural understanding of the Eastern Arctic natives who accompanied him.