B, Hartley Cecil: - Cecil B. Hartley was an American author and editor who lived in the mid-19th century. He is best known for his work "The Gentlemen's Book of Etiquette, and Manual of Politeness", which was first published in 1860. Hartley was born in New York in 1824 and later moved to Philadelphia, where he worked as an editor for various newspapers and magazines. He was also a prolific writer, producing numerous articles and books on a wide range of topics, including history, politics, and social etiquette. "The Gentlemen's Book of Etiquette" was Hartley's most popular work and remains a classic guide to good manners and proper behavior. In addition to his writing, Hartley was also known for his involvement in the abolitionist movement, and he served as an officer in the Union Army during the Civil War. His legacy continues to be felt today, as his book on etiquette remains a valuable resource for those seeking to cultivate good manners and social grace.