Tsinghai. A loess wall under construction. Earth is packed to height of 10' and if necessary loess sun dried bricks added for height. Good for many 10s of years.
Historical Photographs of China album reference: Hv44. Dr. Samuel M. Zwemer's visit to China, part 1. First part of an album containing photographs taken by Christian missionaries Claude L. Pickens, Jr. and Carter Holton. Access to original photographs and albums in the Rev. Claude L. Pickens, Jr. Collection is restricted. Photographs and images from the collection may be reproduced only with written permission. Contact the Harvard-Yenching Library for permissions and fees.