What American modern artist’s depictions of factories, granaries, and other industrial subjects predate those of fellow Precisionists Charles Sheeler and Charles Demuth?

What artist wrote in 1971, “All intervening steps…are of interest. Those that show the thought process of the artist are sometimes more interesting than the final product.”

Answers here~ https://schristywolfe.com/2015/09/09/september-9/