Jewish chemist and statesman (1874–1952) who helped secure the Balfour Declaration of 1917, served as President of the World Zionist Organization, and became the first President of Israel. ALS in French, signed “Ch. Weizmann,” one page, 5 x 8, May 2, 1919. Letter to Mr. Monod, apologizing for canceling dinner plans. In full (translated): “I discovered that Madame Weizmann will be occupied Sunday night. We pray that you would like to lunch with us on Sunday or Monday at one o'clock. I am very sorry for the change but I did not know of Mme W's appointment.” Intersecting folds, one through a single letter of signature, rusty paperclip marks to left edge, and light pencil notations to top, otherwise fine condition. RRAuction COA.