I'm not aware of any such list. I have found one source that asserts--with suspicious exactitude--that"between 1890 and 1900 there were 250 Western train robberies, and in that same period sixty-five lawmen were killed" (Floyd Miller, Bill Tilghman: Marshal of the Last Frontier [New York: Doubleday & Company, 1968], p. 101.) Mr. Miller provides no further documentation of this number.