I understand the lack of primary sources but the question appears to be "how to merge and eliminate clear duplicates". Putting aside the source issue, just go ahead and propose the merges. You can, and should, send each manager a comment explaining that you only wish clear the duplicates and that you are not seeking to finalize sources, or lack of sources. Specifically in this case I would at least attempt to make the bios match as closely as possible prior to merging. For Maria (Delameter) Pearce's info, it does not appear to me to be too much work to merge [Delameter-21] to [Delamater-153]. I would first correct the father and mother to reflect the known sources. Go ahead and mention the previous mis-identification in ==Notes== if you want to keep that in the profile, as well as a comment regarding spelling variations. This will help future researchers.