(Feb. 15, 1870-Sept. 20, 1935). Born in Evansville, Indiana, Hornbrook graduated from DePauw University in 1892 and studied at Harvard Law School the following year. He practiced law in Evansville for a year before moving to Indianapolis and joining the firm of Duncan and Smith. He remained with the firm until his death, at which time it was known as Smith, Remster, Hornbrook and Smith.
An authority on the organization of gas companies, Hornbrook had been on the board of directors ofsince 1918 and for the last 12 years was a member of its executive committee. He was recognized throughout the United States as an authority on constitutional law, particularly the constitutionality of bond issues for governmental units.
Hornbrook was a director at, treasurer of Meridian Street Methodist Episcopal Church, board member for Union Trust Company, and a trustee for and Tudor Hall School ( ). He served as DePauw University board secretary from 1908 until his death, and during this time he secured the gift that made the construction of Asbury Hall possible. He had been a member of the board of directors since 1918 and board vice president for 6 years. From 1926 until his death, Hornbrook was president of the .