Most historians have felt the thrill of discovery at some point while in the archives. There is a rush that comes with finding something new. For me, it has often felt as though I was suddenly taking an active role in the history that I study. I’ve experienced some of these moments in the archives when, for example, I realized that the second page of a letter that was listed as “missing” was actually in another collection that I had just been looking at. But in the summer of 2016, I made a discovery that for me was the fabled “mother lode” and laid out my dissertation before me.