I don't have anything to add, but keep up the good work.
Also, what sources are you using? And do they go back before 1850?
http://www.census.gov/population/www/censusdata/pop1790-1990.html
I used the print version, which matches the PDF at the above, and had entered the population into a spreadsheet some time ago, but now it comes in spreadsheet form. What is particularly nice is that includes a lot of historical notes on county formation.
I had created outline maps of historical. These were based on trying to get the counties reported in the census, and based on historical maps that I found on the internet.
https://www.nhgis.org/
I haven't really explored this, but I think they have historic county maps and data.
Texas joined the Union in 1845, after independence in 1836. I don't know if there were any censuses under the Republic. I came across a book that was published in 1966 that is titled "The 1840 census of the Republic of Texas", but also a review that says that the name is erroneous, but based on tax records - so maybe it is lists of land owners, and perhaps slaves.
http://www.lrl.state.tx.us/scanned/members/general/Apportionment_Laws_1836_1950.pdf
This has the apportionment laws for the legislature and Congress (Texas and USA). The apportionment law for 1848 does include some population numbers, but I don't know the source.
I had originally started mapping the legislative districts, to try to figure out how they had been applied. But they did some really odd stuff, so I decided to see what a different approach would yield.
Thanks. I'm writing a timeline involving an independent Texas; this will come in handy.
