History: Wild West By Timothy H. O'Sullivan

In 1870 he joined a survey team in Panama to survey for a canal across the isthmus. From 1871 to 1874 he returned to the southwestern United States to join Lt. George M. Wheeler's survey west of the 100th meridian west. He faced starvation on the Colorado River when some of the expedition's boats capsized; few of the 300 negatives he took survived the trip back East. He spent the last years of his short life in Washington, D.C., as official photographer for the U.S. Geological Survey and the Treasury Department.
O'Sullivan died in Staten Island of tuberculosis at age 42.