Conversation so far:
When did Hogarth paint Harlot's and Rake's Progresses?
In 1731 William Hogarth completed A Harlot's Progress and was followed in 1733–1735 by the sequel A Rake's Progress.

Question: What are Harlot's and Rake's Progresses?
Self-contained rewrite: What are Harlot's and Rake's Progresses?