Legal Notice: By downloading this lot listing document and/or by using the information contained in it in any manner, you acknowledge and agree that:
a) this lot listing is provided to you as a courtesy only and is not to be treated as a substitute for Christie’s published sale catalogue for Sale 15830 dated (the "Sale Catalogue");
b) this lot listing does not contain all of the Sale Catalogue information for each lot or for the sale itself and that some information in this lot listing may have been amended, deleted or replaced since the date it was first created;
c) you will refer to the Sale Catalogue and any published Sale Particulars, Sale Notices and Addenda for all lot and sale information and for any bidding information, including the "Buying at Christie’s" section and Christie’s Conditions of Sale and any Sale Particulars;
d) any bidding and/or purchases by you shall be governed entirely by the Conditions of Sale published in the Sale Catalogue;
e) that Christie’s is not responsible in any way for your reliance upon any information contained in or not included in the lot listing; and
f) this lot listing is only provided to you and you may not share this with any other party.
Michele Besso (1873-1955) was Einstein's lifelong friend and his only acknowledged collaborator on the ground-breaking theory of Special Relativity (1905): as well as reflecting this close personal intimacy, Einstein's letters to Besso contain discussions of the most important scientific concepts in Einstein's work – including special and general relativity, the cosmological constant, quantum theory and unified field theory. The correspondence has been described as 'quite remarkable' and 'perhaps the most important' in Einstein's life. This second sale comprises some previously unpublished material, including letters to Besso’s family and to their close friend, the toxicologist Heinrich Zangger.