Henry Clay Work (October 1, 1832, Middletown – June 8, 1884, Hartford) was an American songwriter and composer of the mid-19th century. He is best remembered for his musical contributions to the Union in the Civil War—songs documenting the afflictions of slavery, the hardships of army life and Northern triumphs in the conflict. His sentimental ballads, some of which promoted the growing temperance movement, have also left their mark on American music. Many of Work's compositions were performed at minstrel shows and Civil War veteran reunions. Although largely forgotten nowadays, he was one of the most successful musicians of his time, comparable to Stephen Foster and George F. Root in sales and sheer influence. In songwriting, he is renowned for his dexterity in African-American dialect, seriocomedy and melody. His most notable songs were "Marching Through Georgia" (1865) and "Grandfather's Clock" (1876).

https://en.wikipedia.org/wiki/Henry_Clay_Work