Many thanks and appreciation to Esther Rancier for contributing this information. Esther is researching in Richland and Mexico the Soul/Soule, Brace and Daniel P. Smith families, and would appreciate hearing from anyone researching these surnames. 
Esther Rancier at: erase@pacbell.net 

Harriet Rundell, whose popularity in Mexico during her long useful life prompted everybody to call her "Auntie", was a woman of more than ordinary endowments. For forty years she practiced medicine driving her own horse all through the country hereabouts in all kinds of weather. She never attended medical school but "picked up" what knowledge she possessed and she was quite successful. Her husband, W.W. Rundell, was a Methodist clergyman who finally practiced medicine. 

Harriet was liberal to the poor and popular with everybody - the village favorite. She was by far the most representative, best known and most active of Mexico woman in all social and church matters. Very earnest in her support of the Methodist Church she at the time of her death left her large, handsome house to the society for the parsonage.

SOURCE: "Grips" Historical Souvenir of Mexico, N.Y. [1903] p.37.