1. View from north window of engineering office of Costillo Estates Development Company. Showing Published / Created: 1909 Call Number: WA Photos 67 Collection Title: Photographs of San Luis, Colorado Image Count: 2 Found in: Beinecke Rare Book and Manuscript Library > View from north window of engineering office of Costillo Estates Development Company. Showing residence and offce of resident agent, and Costilla County court house. April 12, 1909