CAMILLE is a programming language, inspired by Friedman, Wand, and Haynes (2001), for learning the concepts and implementation of computer languages through the development of a series of interpreters for it written in Python (Perugini and Watkin 2018). In Chapters 10–12 of this text, we implement a variety of an environment-passing interpreters for Camille, in the tradition of Friedman, Wand, and Haynes (2001), in Python.