I have what I believe to be an index number, but don't know how to access it. The index number is KZTX-V4Y. It appears next to the name of my great-great grandfather, Charles Henry Beale
Charles Henry Beale KZTX-V4Y
You can search by the PID (KZTX-V4Y) at https://www.familysearch.org/tree/find/id
Then, on the resulting page, click on Sources to see all the records that have been attached to that profile.
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