Patricia, Found something else on Agnes Gray, in the 1880 census.
1880 census Dent County, Spring creek, Missouri
John Gray age 52 born Scotland works in Iron Mine. Lucy A. Gray wife age 42 born in Virginia. John L Gray son age 20 born Missouri, works in iron mine. Agness Gray daughter born July 1872, age 8. Albert M. Gray born December 1877/78 age 1
These are Agnes's parents and siblings, didn't know if you had this yet or not.