In The Sword of the Silver Knight, the Alden children discover a Medieval Fair has come to town and they are so excited to experience knights, jousting, and all the wonderful food! The children have even volunteered to help out with the fair. But when a valuable sword goes missing, Henry, Jessie, Violet, and Benny are determined to find it and discover who stole it and why. Can the Boxcar Children solve this mystery? #103 in the series.