His photographs of the war were relevant because he took a step forward from traditional war photography and innovated with heartrending pictures that show battlefields’ cruelty and reality ("The Harvest of Death" is a perfect example of this).
After the war, he took part in Clarence King's Geological Exploration of the 40th Parallel, as official photographer. He was also enrolled in an expedition to find the best place for the construction of the Panama Canal.
He explored towards his photographs the possibility of establishing settlements in the far west and the options to exploit those lands. He distanced his