I'm just now beginning a deeper search for the children of Dixon and Rebecca (Smith) Bartley, which explains why I didn't know that George and Ursula are in census records of 1910 through 1930.
When searching for Dixon Bartley at SortedByName, Dixon and his wife Rebecca appeared as the parents of George W. Bartley:
BARTLEY, George W. (child of Rebecca Smith (mother) and Dixon Bartley) ; died 1 May 1931 in Hancock, West Virginia.and
BARTLEY, George W. (son of Rebecca Smith (mother) who was born in Penna. and Dixon Bartley who was born in Penna.) was born 12 Nov 1850 in Penna.;; died 1 May 1931 in Chester, Hancock, West Virginia; and was buried 3 May 1931 in Locust Hill.
Clicking the first link took me to a Hancock County, West Virginia, death registry where some of information from the death certificate had been transcribed. The second link took me to an online view of George W.'s death certificate (shown at left) at West Virginia Vital Records Research.
George and Ursula, along with my great-grandmother, Elvira, (who was George's sister) and her husband Fred Gerner, moved to West Virginia in the 1870s. All of them returned to Butler County, Pennsylvania by the time of the 1900 census. A quick search of the census shows me that George W. and Ursula moved back to West Virginia between 1900 and 1910 and remained there until George's death.
Conveniently, SortedByName also provided links to death certificates for several of George's and Ursula's children and one for Ursula, herself, who died four years after her husband.
I'd like to find obituaries for this great-great-aunt and -uncle.
And I'd especially like to know why George W. Bartley wasn't included in his father's will!