Based on some old family letters, I think my family may have a connection to Anna Sophia Alexander Robertson (~1801-1890), who married William Young Heberton (1792-1826) in Philadelphia. I've found extensive sources for the Heberton family (including Anna and William's children); they were apparently a fairly prominent Philadelphia family, including stockbrokers and Presbyterian ministers. But I haven't been able to find any mention of Anna's parents or siblings.
If I'm right about my family connection, she would be the close relative (sister?) of our supposed "Admiral Robertson of the British Royal Navy who was lost at sea," father of my 3G grandmother Anna Robertson Evans. I have no documentation of him other than rumors in family letters. But if those stories are correct he and Anna Sophia could be recent immigrants from England. Or not... I'm starting to think that part is just family legend.
Any suggestions for places to look for more info? Because the Hebertons appear to be "high society," I'm wondering whether there would be mentions of her marriage or other events in newspaper society pages, but I don't have access to newspapers.com to try to check that. I think I've exhausted the usual Ancestry and FamilySearch searches. Other ideas?
ETA: Found a baptism record at Ancestry for Anna Alexander Robertson, born 11 Feb 1800 and baptized 29 May 1800 at the Third Presbyterian Church, Philadelphia. Father listed as James Robertson. There are two James Robertsons in Philadelphia in the 1800 census so I'm trying to sort that out now.