The document provides an overview of the contract of agency, detailing the roles of the agent and the principal, as well as the various ways to create an agency, including express authority, implied authority, agency by necessity, and agency by ratification. It outlines the rights and duties of agents, the types of agents based on their authority and nature of work, and conditions under which agency can be terminated. Additionally, it discusses the implications of appointing sub-agents and the conditions under which an agency becomes irrevocable.