File consists of business and personal papers of Louis Breithaupt. Includes statements of accounts, raiload advice notices and freight receipts (one dated 1862 at Berlin Station), business correspondence, etc. Includes letters in German from F.A. Goetze, N.Y., recipe for lubricating compound, receipts for city, county, and school taxes, 1858-1859 (one receipt shows three properties in Buffalo), letter to Thomas Bowness in Woodstock, Ont. from J.F. Schoellkopf, November 15, 1861, letter to Louis Breithaupt from J.F. Schellkoepf, July 23, 1861, letter from Charles A. Ahrens, June 19, 1861, letters written jointly to L.B. from Jacob J. Vogt (in English) and Jacob Hailer (in German), Niagara, June 7, 1859 regarding business matters (salutation reads "Dear Brother, Father and Mother Hiler came to our plase...), receipt for household goods purchased for Jacob Wagner, April 30, 1859. Also contains an unbound day book in German with entries from December 19, 1859 to August 15, 1861.

Contract, signed on 27 October 1832 in Waterloo Township to build the Hailer Home on King Street in Kitchener. Signed by Jacob Hailer, Philip Salzberger (builder), and Friedrich Kummel (witness).

Notebook of accounts from April 2, 1862, to February 4, 1863. Inset are small handmade booklets with untranslated German script.

Letter of guardianship appointing Jacob Hailer the legal guardian of Catherine Wagner and Louis Henry Wagner. Catherine and Louis Henry were the children of Margaret Hailer Wanger and Jacob Wagner, and were left without an appointed guardian upon the death of their father Jacob Wagner in 1858.

One wanderbuch (journeybook) recording Jacob Hailer's journeyman as a wheelwright. A wanderbuch served as both a passport and a resume and has pages for local authorities to give approval to work and for employers to make statements about the worker's qualifications. Hailer worked in various cities across Germany including Durlach, Muhlburg, and Kehl.