Thanks for the opinion.
By "unicorn" I meant ( and still do) exactly what you describe: multiple mentions of it but no actual evidence.
here is a South Russian ( or North Caucasian, or Steppe, depending what you want to call the area ) sword: a typical "Kilij"
http://cgi.ebay.com/Medieval-Kyivan-...QQcmdZViewItem
There are quite a lot of similar examples in the museums.