In a national radio broadcast on May 8, 1945, President Harry S. Truman, breaking the news to war-weary Americans that the fighting in Germany had come to an end, delivered a poignant opening sentence: “This is a solemn and glorious hour.”Transcripts and recordings of the speech are available at the Truman Library and through countless sources on the Internet. But what those easy-to-find records miss is an important nugget of history.The second sentence of the speech, a remembrance of President Franklin Delano Roosevelt, who had died less than a month earlier, was a late addition.“I only wish that Franklin Roosevelt had lived to see this day,” Truman wrote under the opening line.President Harry S. Truman’s broadcast speech with notes announcing the surrender of Germany, May 8, 1945. Image courtesy of the José María Castañé CollectionThe document — the actual transcript Truman used for the broadcast, with his handwritten notes — is part of a collection of historical papers, manuscripts, books, photographs, and other media donated to the Harvard Library by the José María Castañé Foundation last year.The Castañé collection of about 3,000 items is keenly focused on major conflicts and transformative events of the 20th century, including the Russian Revolution, the two World Wars, the Spanish Civil War, and the Cold War.A small selection on display at the Houghton Library this summer served as an introduction.Leslie Morris, curator of modern books and manuscripts at Houghton Library, said that the aim of the exhibition is to give scholars interested in 20th-century history a hint of the potential for new research and teaching opportunities within the collection.“We’re not keeping it to ourselves,” said Morris. “We’re doing our best to publicize it in many different ways — the exhibition, the website, the Harvard catalogs — to integrate it within the collections and the teaching and research of the University and beyond.”The collection is vast in its store of individual pieces, including some 10,000 photographs, pages of document sets, and books. Also included are personal items from key leaders, such as Winston Churchill’s daily engagement cards, kept by his secretary, John Colville.Each item seems to shed light on a moment in history — some well-known, others more obscure. A page of minutes from a meeting of the last Russian Provisional Government captures a diatribe from Marxist revolutionary Leon Trotsky that helped spark the Bolshevik revolution. Albums of photos taken by German soldiers during World War II, including images of Adolf Hitler playing with a child and socializing with Benito Mussolini and Nazi leaders, are also included in the collection.One of the artifacts recently on display was a detailed diagram of the atomic bomb run on Hiroshima by the navigator of the Enola Gay, which shows the flight path of a second plane circling in reserve if the first pass failed.Truman’s speech marking the end of the war in Germany was also part of the introduction.“What I find evocative in this document is what you will not get from the tape of the transcript,” Morris said. “This shows he had the speech written and then he knew he had to say something about F.D.R.”The collection is the work of Spanish businessman and patron of the arts Castañé, who said his interest in history dates back to his childhood in Spain in the aftermath of the Spanish Civil War and during World War II. Following the death of his son, in 1985, Castañé began to collect historical documents as an outlet for his grief. Soon he was on a quest to create a world-class collection.“It is not surprising that I have kept all along my life the vivid memories of my relatives’ discussions about the events of the Second World War,” Castañé said from his home in Madrid. “In fact this is the real background for my spontaneous decision almost a half-century later to initiate a collection of significant historical documents about the upheavals of the 20th century worldwide.”Over three decades Castañé created a collection of more than 7,000 pieces, many with multiple objects, boosting the actual number of items to the tens of thousands. In 2004 Castañé created a foundation to protect his holdings. Last October he donated a portion of the collection to the Harvard Library.Castañé said gifting the collection to the Harvard Library expands the possibilities for its use in research and teaching, because the University’s collections and online materials are an important source of information and point of access for people around the world.“This is a leap forward in terms of diffusion of the knowledge in the collection and its components,” he said. “Physically seeing these documents is important and should facilitate, though fellowships or other means to researchers and students, use of them in the proper investigations and their own research.”The library is in the process of cataloging the collection, but individual books and periodicals can be found in the Harvard Library portal HOLLIS by using a keyword search collection for José María Castañé Collection. Access can also be arranged in advance by contacting the Modern Books and Manuscripts Department.