Hello,
Thank you for your prompt reply!
My great-great grandfather came to the USA from Cumbria, leaving Lake Windemere behind! I discovered there were four .pdf's that were over 460BG each, so I omitted them from the recovery. I proceeded with the recovery, choosing only files in "Excellent" states, and most of those either open blank pages or produce errors, refusing to open.
Thank you again, and be well.