A notice in the Salisbury Journal, Monday 17 August 1752, reads:
“WHEREAS a large FAIR has been annually held at YARNBURY-CASTLE, in the County of Wilts, on the twenty-third and twenty-fourth Days of September; This is to give Notice, That according to the Alteration of the Stile, the faid Fair will, for the future, be held on the fourth and fifth Days of October.”