The volume compiles short, accessible articles that explain theological terms, liturgical usages, church law, architecture, councils, and heresies, aimed to clarify misunderstandings among lay readers. Entries defend the Church of England’s claims to both catholicity and Protestantism, compare doctrines with Roman Catholic positions including references to decisions of the Council of Trent, and provide practical notes on ritual and administration. Later editions expand and revise articles with input from specialists, add authorities and cross-references, and intend to serve as an elementary but documented handbook for clergy and informed laity.