Records from various departments during the city's history responsible for streets, public works, and public improvements. Different departments records are arranged into series.

The records are manuscript volumes. Volume one has printed headings with the title, "Bills receivable of the testamentary executors of the estate of John McDonogh," at the front of the book, with "Bills payable ..." at the rear. The second volume, dated 1850-1852, is a cash book of receipts and expenditures.

The records of the Third Municipality include the Third Municipality Council, financial and legal departments, and records of police, correctional institutions, and wharfs. The image to the right shows the boundaries that were in place during the Municipality Period from 1836-1852, dividing the city into three separate entities. The Third Municipality occupied the area east of Esplanade, and east of the First Municipality.

Records are separated into series according to date, as the functions of make up of the office changed throughout history. Additional descriptions are included within each series of records. Researchers should note that during the period of 1836-1852 the city was divided into three separate municipalities, with separate governing bodies. Financial records from this time period are described with each municipality's records.

Manuscript volume, in English and German, containing copies of letters sent to customers in various U.S. cities, Havana, and Hamburg by members of the firms. They describe the difficulties that it faced during the business panic, as well as the everyday conduct of business.

Records of the Workhouse include:

• Inventories of stock on hand, 1851-1856
• Record of medical care administered to the inmates of the Workhouse, 1854-1856
• Record of work performed by the Workhouse, 1852-185
• Account book, 1852-1857