From the Chicago Sun-Times:
The more than 100 documents compiled at a university near Tokyo amount to a microcosm of Lincoln’s career, with some of the most compelling finds ranging from his early professional life in New Salem all the way to his presidency.
There are “these nice pieces that pull together different aspects of Lincoln’s life,” said Daniel Stowell, editor of The Papers of Abraham Lincoln, a project run by the Abraham Lincoln Presidential Museum and Library in Springfield.
Stowell said researchers have known about many of the documents in the collection for decades but were surprised to learn last month about an additional 51 that help make it one of the largest Lincoln collections anywhere.
See Also: “Lincoln researchers discover Japan: Largest Lincoln document repository outside of the United States yields scores of documents from the 1830s through his Presidency” (via PapersOfAbrahamLincoln.org)