Δαφνη Ευτυχια Αρθουρος

I'm hoping that's it -- unlike some folks, like Thomas Jefferson for example, I didn't see a lot of quotations cited as "letter to so-and-so, {year}", nor a collection of full texts of letters. But I didn't think to Google "William Penn letters", so maybe it's all out there somewhere. Thing is, it's one of those lines that sounds right, but also sounds like the kind of thing soebody would make up and attribute later, or forget where they heard it and go, "well it sounds kinda like Penn...". (Like the famous not-actually-Voltaire quote.)

Actually, I think I care less about whether Penn said it than about knowing for sure who said it, whoever that is. But it would be a litte less messy if the many, many sites attributing it to him turn out to be right.