{HEAD ~ a carriage} affixed to {TAIL ~ said reflector} and slidably mounted to said third rail 
affixed to
{ HEAD ~ a carriage } affixed to { TAIL ~ said reflector } and slidably mounted to said third rail
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH