What about those for whom no record was ever kept?

"Those who thoughtfully consider the work inquire about those names that cannot be collected. 'What about those for whom no record was ever kept? Surely you will fail there. There is no simple way you can search out those names.' To this I simply observe, 'You have forgotten revelation.' Already we have been directed to many records through that process. Revelation comes to individual members as they are led to discover their family records in ways that are miraculous indeed. And there is a feeling of inspiration attending this work that can be found in no other. When we have done all that we can do we will be given the rest. The way will be opened up. " Boyd K. Packard, Ensign Nov 1975