Private User has pointed out that "the information about Ermengarde's death is:
October 3, 818 - 819, Age 40 Death of Ermengarde; AngersAngers, Pays de la Loire, Neustria, Frankish Empire, Ermengarde of Hesbaye
but her daughter's birth is given as:
824 - 805, Age 40; Birth of Adélaïs, Abbess of Saint Peter's, Tours, Centre, France http://www.geni.com/people/Ad%C3%A9la%C3%AFs-Abbess-of-Saint-Peter-...
I appreciate the difficulty of verifying dates from so long back, but just thought you might want to check. - Leith"
Thanks, Leith. I seem to recall a lot of complicated work on this line of profiles, so hope to get back to it when I'm finished with the Herodians. In the meantime it seems sensible to me to move Adelais' birth back to before her mother's death. Perhaps a good chance she died in childbirth, I'd imagine.
If Leith or anyone else is interested in investigating the research accuracy on this line further. PLEASE go ahead. Maybe log your findings (confirmations or changes) here, so we have a history of our research work, and avoid re-inventing the wheel.
Jump in fellow armchair historians.... :-)