Recently I located a Duell family plot while doing some other research in a cemetary. The family monument was quite prominent, which was why I wandered over to get a better look.

Buried here are:
Charles Holland Duell 4/13/1850-1/29/1920
Harriet Sackett Duell 9/12/1854-11/7/1916
William Sackett Duell 3/28/1882-5/23/1926
Louise Childs? Duell 4/19/1882-7/12/1919

It is the Cortland Rural Cemetary, Cortland County, NY

Does this help anyone?