Extemporaneous preaching is a style of preaching that was popular in the late 19th century among Baptist (Primitive Baptist especially), Methodist, Unitarian, and some Presbyterians preachers, such as Blackleach Burritt. Some of the more famous preachers who employed it were Charles Haddon Spurgeon, Charles Grandison Finney and Peter Cartwright. The style is not to be confused with impromptu preaching; it involves much preparation. One prepares by dwelling on the subject continually and thus has something to say when the time comes.