Naaaaw! These are male and female!
http://www.themodernantiquarian.com/browse.php?site_id=901
Back to the 'One Short, One Tall' type row. They are quite common in the west of Ireland, but many other places. I was quite surprised to see them in a Scottish context. The north & north-east of Ireland is pretty devoid of such things .... hhhmmmm
Any copper around those parts?