Soldier or Photographer?

I had thought that the "Leo Sansinon" written on the photograph might be the name of one of the soldiers. But I have gone through Connecticut Fights which lists officers and enlisted men and have not found the name there. Perhaps it is the name of the photographer.

Mexican Frontier Temperature

After learning that the 2nd Connecticut Infantry was re-designated as the 102d Infantry, I turned to our archival collection to look at Connecticut Fights The Story of the 102nd Regiment by Captain Daniel W. Strickland. Under the chapter, The Mexican Border Mobilization-

The various battalions detrained in the freight yards of Nogales and got their first taste of what Mexican frontier temperature was like in July. The rocky gound was so hot that men stood about on the edges of the soles of their shoes...a mid-day sun beat down upon a white-gray dust, the temperature being something over one hundred and twenty-five degrees.