John, on the 1850 census it has The 1850 cenus has:
Jno. S. Edelen, age 48, Planter;
S.H. Edelen, 47,
Robt. Edelen, 16,
Jno. D. Edelen, 11 months,
F.D. Edelen, 8 months old.
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On the 1860 census it has:
John S Edelin 58, Farmer
Sarah H Edelin 57
John D Edelin 21
Frances D Edelin 18
I suppose Robert Edelen, John's fist son, was gone and married by the 1860 census. Also, I just commented about all this on the Southern Maryland Families FB page too! See you there.