The Irv Engelbrecht Railroad Lease Papers consists of general lease agreements, standard industrial track agreements, standard industrial ground leases, transfer contracts, and related maps and correspondence. The leases are between the Southern Pacific owned St. Louis Southwestern Railway, Texas and New Orleans Railroad, or the Houston, East and West Texas Railway and various Lufkin businesses for use of property along the right of way. The collection provides a record of many Lufkin businesses no longer in existence along with their location.