The SAE archive contains more than 750 boxes of manuscript materials that include more than 700,000 individual pages. Thousands of letters are more than one hundred years old, and most of them are still folded and stored in their original envelopes. This section shares an initial sample of these (mostly) never-before-seen communications. Click below to load additional letters, or conduct a search to find something specific. Check back regularly to see what additional letters have been added.