Based on the place of birth of their children in the 1880 census, Silas and Henrietta lived in Pennsylvania, moved to West Virginia after 1868 and back to Pennsylvania after 1872. They apparently moved back to West Virginia after 1877 because son Henry was born there in 1879.

1880 Census, Richhill Twp., Greene Co., PA, p. 356A257
McCracken, Silas C., 46, b. OH, parents b. PA, physician
Henrietta, wife, 37, b. PA, parents b. PA
William E., son, 14, b. PA
James L., son, 12, b. PA
Liston T., son, 10, b. WV
Robert C., son, 8, b. WV
George T., son, 6, b. PA
Henrietta V., dau., 3, b. PA
Henry C., son, 1, b. PA