I want to geocode census records from the U.S. Here is one example from 1870. This particular census page is from the 6th election district, 8th ward of New York County. Here's one from the 1910 Census. This one mentions the county, township, supervisor district, and enumeration district.
I can geocode the county, state. I'm wondering if there are any resources which include latitude/longitude for districts, wards, supervisor districts, and enumeration districts from the past to help me geocode census records. I did find NHGIS, but their data is quite sparse for anything more fine grained than the county level before 1940.