ABOUT A set of four blue prints for a residence in San Mateo Park, San Mateo, California. Sold as a set only. CREATOR Herbert O. Alden, San Francisco, CA. DATE OF MANUFACTURE c.1923. MATERIALS AND TECHNIQUES Blue Print Paper. CONDITION Good. Wear consistent with age and use. Minor wear on some. DIMENSIONS H 16 in. x W 24.5 in. HISTORY Unknown.