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Transporting the obelisk
anonymous, 1880
Laying the corner-stone
anonymous, 1880
The obelisk crossing the Hudson…
anonymous, 1880
In the tunnel heading by electric…
C.F. Ferrer, c. 1883 - in or before 1887
Headhouse, Shaft No. 29 Tenth…
C.V.V. Powers, c. 1883 - in or before 1887
Ingersoll drill Co's compressor…
C.V.V. Powers, c. 1883 - in or before 1887
Excavating shaft No. 26
George P. Hall & Son, c. 1883 - in or before 1887
Driving the heading shaft no 23
Preston K. Yates, c. 1883 - in or before 1887
South Yonkers Gate House looking…
Preston K. Yates, c. 1883 - in or before 1887
Headhouse shaft No. 25
C.V.V. Powers, c. 1883 - in or before 1887
Shaft no 25, and blowoff drift
C.V.V. Powers, c. 1883 - in or before 1887