"being a collection of sentences, divine, moral, and historical : selected from the writings of many ingenious and learned authors, both ancient and modern : intended not only for the use of schools, but as a pocket companion for the youth of both sexes"
Worcester [Mass.] : From the Press of Isaiah Thomas, jun., 1795.
Digital, full-text versions of almost 2,000 children's books from the 19th and early 20th century. In addition to fiction and poetry, there are a number of "conduct of life" books, such as the 1846 How to Be a Lady: A Book for Girls. You can limit by topic in the menu on the left.