Complex sentence: He marked his survey line with stones, wood, and iron markers; the only one who placed such markers A new survey in 1893 showed that the Von Schmidt line was 1,600 to 1,800 feet west of the actual 120 degrees.
Split into simpler sentences: He marked his survey line with stones, wood, and iron markers. He was the only one who left such markers A new survey in 1893 showed that the Von Schmidt line was 1,600 to 1,800 feet west of the actual 120 degrees.