Conversation so far:
What was William Hogarth's Harlot's?
A Harlot's Progress (also known as The Harlot's Progress) is a series of six paintings and engravings by the English artist William Hogarth.
And what was William Hogarth's Rake's Progresses?
A Rake's Progress (or The Rake's Progress) is a series of eight paintings by 18th-century English artist William Hogarth.
Was William Hogarth's work well respected?
William Hogarth was by far the most significant English artist of his generation.
Was there more impressive information in the article?
Charles Lamb deemed William Hogarth's images to be books, filled with the teeming, fruitful, suggestive meaning of words. Other pictures we look at; his pictures we read.

Question: What exactly did the Hogarth's Act protect?
Self-contained rewrite: What exactly did the Hogarth's Act protect?