IN PICS: 'Stolen' Darwin Notebooks, One With Tree Of Life Sketch, Back In Cambridge University After 20 Years

A handout image released by the University of Cambridge Library on April 5, 2022, shows the returned 1837 'Tree of Life' sketch on a page from one of the lost notebooks of British scientist Charles Darwin | Photo: AFP

Two of Charles Darwin's notebooks containing his pioneering ideas on evolution and his famous Tree of Life sketch were returned anonymously, Cambridge University Library said on April 5, 2022 | Photo: AFP

The 1837 'Tree of Life' sketch on a page from one of the lost notebooks of British scientist Charles Darwin | Photo: AFP

A handout image released by the University of Cambridge Library on April 5, 2022, shows clingfilm being removed from the returned missing notebooks of British scientist Charles Darwin | Photo: AFP

The prized documents, reported stolen in 2001, were left on the floor in a public area of the British university's library in a pink gift bag, with a typed note wishing a Happy Easter to the librarian | Photo: AFP