Image #235 (4.5" x 2.75"): "4-7-29. Material Tower with two 50 ton stiffleg derricks on top, erected to a height of 3 panels (ab't 95 ft.) On dock at Pier 13."; Image #238 (4.5" x 2.75"): "4-9-29. Main boom of Span Traveler 'B' being raised by gin pole after A-frame has been tripped into position."; Image #239 (4.5" x 2.75"): "4-9-29. From deck of Viaduct Traveler 'C', erecting Span Traveler 'B'."
