The Rare Book Detective: books, type, watermarks: 1648 cardinal hat with shield watermark
The Rare Book Detective: books, type, watermarks: 1648 fleur de lis between chainlines
The Rare Book Detective: books, type, watermarks: 1648 fleur de lis and PM watermark
The Rare Book Detective: books, type, watermarks: 1648 fleur de lis with letters watermark