Well, since the sleighbells are a gimmick to go along with the theme of the song maybe the clicking is too. Like someone slapping the horsewhip across the seat as they glide along to Grandma's house for a couple of Bangkok Burgers and haggis or whatever he and the Watchman were planning for dinner that night. But really someone knows and maybe they'll come forward someday. Or maybe all the people who really know are passed on or not talking to us these days.
Bill
