Correspondence, site map, blueprints. Correspondence between railroad executives regarding requirements of Post Office Department for Railway Mail Service and Railways Express Agency, Inc. at planned LAUPT. Includes an engineering department study of mail, baggage, and express facilities. Also includes LAUPT track layout and cost estimates for alternative joint baggage and express facility layouts. Also includes blueprint plan of Union Station building and landscaping, with parking areas drawn off of Alameda Street.