The original 140-page autograph manuscript of "The Little Prince", along with various drafts and trial drawings, were acquired from the author's close friend Silvia Hamilton in 1968 by curator Herbert Cahoon of the Pierpont Morgan Library (now The Morgan Library & Museum) in Manhattan, New York City. It is the only known surviving handwritten draft of the complete work. The manuscript's pages include large amounts of the author's prose that was struck-through and therefore not published as part of the first edition. In addition to the manuscript, several watercolour illustrations by the author are also held by the museum. They were not part of the first edition. The institution has marked both the 50th and 70th anniversaries of the novella's publication, along with the centenary celebration of the author's birth, with major exhibitions of Antoine de Saint-Exupéry's literary works. Physically, the manuscript's onion skin media has become brittle and subject to damage. Saint-Exupéry's handwriting is described as being doctor-like, verging on indecipherable.