One of the mounted men was dressed in fringed buckskin, his shoulder-length hair and bushy black beard the badge of a frontier already passing swiftly into history.
One of the mounted men had long hair and a black beard.  
mnli hypothesis: One of the mounted men had long hair and a black beard.   premise: One of the mounted men was dressed in fringed buckskin, his shoulder-length hair and bushy black beard the badge of a frontier already passing swiftly into history.