What is the author's style in The Warden by Anthony Trollope?

There is a lot of terminology that refers to the Anglican Church, such as precentor, vestry, litany, and archdeacon. Although many of these terms, and other old-fashioned words in the book, may seem confusing and outdated, this is appropriate. This book deals with the issue of what to do when moral codes seem confusing and outdated, whether referring to biblical commands, or how to interpret a 400-year-old will. Sometimes, understanding an ancient issue requires using old words.