July of 1868 is a little jacked up, shows up more than once.
For onlookers who would like a wall map that shows many of these territorial changes, the United States Geological Survey map UNITED STATES OF AMERICA PUBLIC LAND SURVEYS,
https://store.usgs.gov/yimages/PDF/101208.pdf
http://store.usgs.gov/b2c_usgs/catalog/query/(xcm=r3standard...
may be of interest. The usability of the federal government online map store leaves a LOT to be desired, but I have successfully ordered a copy of this map just a few months ago, and it looks gorgeous on a sufficiently large wall. (I first saw this in person at a map store in DC, back in the 1980s, and my previous copy of the map was tattered, so I ordered a fresh copy this year.)