Sentence:  In further confirmation that this is not the date of the origin, it may be stated, that there is very early mention of Commissaries' <WSD>Fiars</WSD>, Sir John Connell tracing the commencement of these so far back as the Reformation, when Commissary or Consistorial Courts were established, in place of those of the bishops or their officials; and notice is taken of the <WSD>Fiars</WSD> prices of grain in the records of the Commissary Court so far back as 1564—somewhat earlier than the statute above quoted. 
Meaning of the word marked with <WSD> tags:  The price of grain in the counties of Scotland, as legally fixed on an annual basis.