The Pontifical Academy of Sciences. Plenary Session on Science and Sustainability, programme, signed with right thumb-print of Stephen Hawking, Vatican City, 2016; coupled with a number of related ephemera(9)

The Pontifical Academy of Sciences. Plenary Session on Science and Sustainability, programme brochure, signed with right thumb-print of Stephen Hawking on page no.10 beside his photograph, with authentication inscription "This is the right thumb-print of Professor Stephen Hawking witness by Steve Grocutt 28-11-2016", 8 ff., 11.5 x 8.25 in (29.7 x 21 cm), Vatican City, 25-29 November 2016; plus a letter of authenticity signed by Stephen Grocutt; plus an Order of Service of Thanksgiving for Professor Steven Hawking, Westminster Abbey, 15 June 2018, in original wrappers; together with 6 others, ephemera relating to the Plenary Session and Hawking, together all items in a smart wooden box measuring 12.5 x 12.5 x 4.75 in (32 x 32 x 12 cm), laser etched on top "STEPHEN HAWKING / 8 JANUARY 1942 - 14 MARCH 2018 with the equation S = (ℼAkc³) / (2hG), which is one of his most famous and seminal work that explains the concept of Hawking radiation.
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