A striking 1912 lithograph by Joseph Pennell documenting the construction of the Panama Canal, capturing workers suspended by a crane at the Gatun Lock.

Joseph Pennell, a prolific American illustrator and printmaker, travelled to Panama in 1912 to document the construction of the Panama Canal. This lithograph, titled The End of the Day, Gatun Lock, captures the immense scale of the engineering project. Pennell focuses on the human element within this industrial environment, depicting a group of workers suspended in the air by a crane as they finish their shift. The composition uses a steep perspective to draw the eye down the length of the concrete lock walls, creating a sense of depth and monumental size.

Technically, the work demonstrates Pennell's mastery of the lithographic medium. He employs varied mark-making to differentiate between the rough texture of the concrete, the hazy atmosphere of the late afternoon, and the dark, silhouetted forms of the labourers. The contrast between the heavy, static architecture and the dynamic, suspended figures creates a narrative of human effort against a backdrop of modern machinery. The scene is devoid of colour, relying entirely on the interplay of light and shadow to define the space. This print is part of a larger series Pennell produced to record the progress of the canal, a subject that fascinated him for its combination of raw power and aesthetic potential. By choosing to depict the workers at the end of their day, he provides a human perspective on a project often defined by its sheer mechanical output. The work remains a significant record of early twentieth-century industrialisation, documenting both the physical transformation of the landscape and the daily lives of those involved in the construction.