I put The Historical Atlas of the United States on my wish list over a decade ago, when it was newish and $70 or so. I included a note not to purchase it until it went under $10. It's about $4 plus shipping, so it finally came amongst my birthday presents this year. Long have I waited.
There are fascinating things already, but what I notice first is something I have long known but keep forgetting. (Sorry, Professor Jonathan.) Old maps are hard to read. Tedious. Only recently has the idea of a user-friendly map been so high up the scale of values. The need for useful-at-a-glace road maps may be part of this. It's still fascinating stuff, to look at coastlines and river mouths drawn in exquisite detail, reflecting the needs of ocean-going navigators but of little use to most of us today, trailing off into vagueness just a few miles in, with mountains and settlements in only approximately the right places, an on beyond, much speculation. It reminds me again, the coasts were settled first and were the entire show for a century and a half after Jamestown. As a point of reference, Lexington KY, now only an eight-hour drive from the Atlantic, was a campsite in 1775 when they heard news of the Battle of Lexington and Concord and decided to commemorate that with the name. (Digression. Sorry.)
We have really wonderful maps these days.