Jourdi,
Have you seen this census (1930 Luzerne County, PA with a John Morgan and his children)? His wife is not present, but he is categorized as "Married" and not "Widowed", so she may have been away.
https://www.familysearch.org/ark:/61903/3:1:33S7-9R8Q-DV2?i=18&cc=1810731
Do you think this is them?
John Morgan Male 49 Married White Head 1881 Pennsylvania Pennsylvania Pennsylvania
Mabel Morgan Female 18 Single White Daughter 1912 Pennsylvania Pennsylvania Pennsylvania
Harold Morgan Male 15 Single White Son 1915 Pennsylvania Pennsylvania Pennsylvania
James Morgan Male 9 Single White Son 1921 Pennsylvania Pennsylvania Pennsylvania
Alfred Morgan Male 7 Single White Son 1923 Pennsylvania Pennsylvania Pennsylvania
Reba