Labels:text | handwriting | font | letter | number | ink | document OCR: Fra Pietro da Novellara Letter to Isabella d'Este April 3, 1501 Mantova, Archivio di Stato di Mantova, Archivio Gonzaga, busta 1103 Fra Pietro da Novellara writes to Isabella d'Este from Florence at her request, informing her that Leonardo is working on a cartoon of the Virgin and Child with St Anne. The work described by Fra Pietro has been lost, but at around the same time the painter executed ---------- another cartoon for a picture having the same subject, which had perhaps been ordered by King Louis XII of France a few years earlier. This second cartoon is preserved in London's National Gallery. four