60-inch Rockefeller building under construction

Construction site seen from roughly west-southwest, showing the cutting into the bedrock within which the 60-inch building will be constructed. 6 people are seen inside the cutting, and 2 outside. Just left of centre in the image is a large, light-coloured cube of what appears to be worked stone. n/a. Extent: 1 glass plate. Size and dimensions of original material: Height 8.2cm, width 10.7cm, thickness 0.3cm. Condition of original material: Stable. Author(s)/Creator(s): English. Scribe(s): Latin. Publisher(s): Left-to-Right. Editor(s): Unrestricted. Volume number: N/a. Original institution reference: PLB32_10_2065.