The Horlbeck Daybook, 1835-1837, was kept by members of the Horlbeck building and architectural business. Included in the daybook are lists of work done for clients such as remodeling, repair, or construction. Buildings worked on include the jail, St. Stephen's Chapel, the Fire Master's Department, and the Poor House. The descriptions include types of materials used and the number of Black and White employees working. Black employees consist of enslaved and freed persons.