Complex sentence: In 1924, at the age of seventy, Tilghman accepted a position as marshal of Cromwell in Lincoln County, Oklahoma, though he had been warned that because of his advanced age he might be shot to death on the job.
Split into simpler sentences: In 1924, at the age of seventy, Tilghman accepted a position as marshal of Cromwell, Oklahoma. He had been warned that because of his advanced age he could be shot to death on the job.