The Twins Timeline and Summary

Bonnie and Beanie, playing on the courtyard at about age two-and-a-half, are teased by Janie.
The twins take playful revenge on Janie in the copse.
Bonnie and Beanie are befriended by Janie.
They have to be taken home by Janie when her mother complains about "n*****s" being there.
They join up with Janie when she runs away from home.
The twins live in the Mr. Kew mansion with Janie.
Bonnie and Beanie and Janie move into the shelter with Lone and thrive there.
Bonnie and Beanie fetch and ferry things for Lone's gestalt.
Bonnie and Beanie move to Miss Kew's house with Gerry and his version of the gestalt.
The twins are segregated off by Miss Kew, but break the segregation on Gerry's orders.
The twins return to the Mr. Kew mansion with Gerry's gestalt after he murders Miss Kew.
Bonnie and Beanie fetch and ferry things for Gerry as he goes to college.
The twins aid Janie and Hip in their quest to reform Gerry.