Precious Thimble was a swamp witch, late of the Mott Irregulars. She had some healing skills.
Precious Thimble signed up as a shareholder with the Trygalle Trade Guild. The two Bole brothers, Amby Bole and Jula Bole, who were both vying for her affection, signed up as well in order to stay with her.
Precious Thimble and other surviving members of Master Quell's Trygalle Trade Guild caravan - Gruntle, Faint, Sweetest Sufferance, Mappo Runt and Amby Bole - were travelling across the 'Letherii Wastes' of Lether along with Setoc, Torrent and the children Stavi, Storii, and Absi (as well as the undead individual known as Cartographer).
Olar Ethil appeared and laid claim to Absi, making deals with the adults to prevent opposition. She promised that Precious Thimble would find what she needed (i.e., a way home to Genabackis) to the east. Olar Ethil also told Precious that she had touched her soul and had made it into a Mahybe - a vessel that waits (a statement which Precious found puzzling).