Scrambling weather data

I am going to cross historical weather data for a very long time - ideally from the late 1800s - early 1900s. So far, I have been collecting historical data using the Wunderground API. I've also seen previous questions on StackOverflow about collecting historical meteorological data (such as Where can I find historical raw weather data? And NOAA Historical Meteorological Data ), but the named sources do not seem to collect data for this time period.

Are there any good data sources for this time period? How can we access this data?