Bureau of Land Management General Land Office Records Search Site
If you are looking for US land patents or records in the 1800s, then you might want to check out the BLM GLO website. Using their search engine, I was able to find and view scanned copies of the original land patents for several ancestors in Missouri in the 1840s.
According to the BLM GLO website:
"We ... provide image access to more than three million Federal land title records for Eastern Public Land States, issued between 1820 and 1908. Currently, we are adding images of Military Land Warrants. These land patents were issued to individuals as a reward for their military service. Images related to survey plats and field notes, dating back to 1810, are added to the site state-by-state as each state's documents are completed. Due to organization of documents in the GLO collection, this site does not currently contain every Federal title record issued for the Public Land States."
Excellent website, well worth checking out!
Have a great day!