Glue Boy was the horse of Cuthbert Allgood. It was known for being very skittish and was used by Cuthbert when the original Ka-tet travelled to Mejis in Wizard and Glass. It died on the return journey home. As Cuthbert tried to get it to cross the Xay River Canyon, the horse panicked and broke its fetlock. Cuthbert then had to shoot his horse to put her out of her misery, and its body fell into the Canyon.