Think I found your Jane Davidson. Theres a deed at the courthouse that mentions the 'deceased' William Davidson, Andrew Davidson, Jane Davidson, Jenny/Ginny (Jane?) McCartney, A B Davidson, Sally Davidson, Nash Pitzer (sp?), George L____man, John Pitzer (Pitzen?), Robert Davidson, and William Davidson (Jr?). Its dated 1815 (same year John died?).
The courthouse also has John and Jane's marriage bond (1/10/1803).firstname.lastname@example.org