Harold Steele MacKaye (1866-1928) was an American lawyer and author. He received his C. E. degree from Columbia University, New York in 1887, LLB and LLM degrees from Georgetown University, Washington, D.C. in 1891. In 1892 he was admitted to the bar in New York. In 1903 he wrote his first work, The Panchronicon (1904), a science fiction novel with a humourous twist. His other works include: The Winged Helmet (1905), Lucinda's Whim (1912) and Which Are You? (c. 1920).