Hi,

Margaret may show up in tax records for Loudoun - because she is listed in the free register as are her children (with descriptions)

There may be information in tax records about her birth county.

Do you know what her relationship was to Margaret DORRELL - who verified her freedom and the childrens?

There were Dorell's in Waterford - which was a Quaker town, and some FPOC lived and worked there. You might want to check with the Waterford foundation.

Denise