Group photo during 60-inch Rockefeller building construction

Construction site seen from roughly west-southwest. Three groups of people are posing in the cutting into the bedrock within which the 60-inch building will be constructed. 9 people are standing within the cutting, several holding tools. Behind them stands a vertical pipe held in place by supports, presumably marking the centre of the enclosure. Standing at the rim of the cutting are two groups of three people. Two surveying instruments are visible. The print has high contrast. PB13_0020 and PB13_0030 are duplicates, and derivatives of plate PLB32_0007. n/a. Extent: 1 photograph. Size and dimensions of original material: Height 21cm, width 31cm. Condition of original material: Negligible damage. Slight foxing. Fishmoth damage. Slight creases, tears, and notching. Author(s)/Creator(s): English. Scribe(s): Latin. Publisher(s): Left-to-Right. Editor(s): Unrestricted. Volume number: N/a. Original institution reference: PB13_P0539.