Who sets language policy today? Who made whom the grammar doctor? Lacking the equivalent of l’Académie française, we English speakers must find our own way looking for guidance or vindication in source after source. McGuffey’s Readers introduced nineteenth-century students to “correct” English. Strunk and White’s Eleme Memoria Press product: https://www.memoriapress.com/curriculum/mcp/the-trivium-the-liberal-arts-of-logic-grammar-and-rhetoric/