I can see the writing pretty well in Verywierd's attachment. From what I can gather with your help and by turning the post card at different angles to reflect the pencil markings, I think I see:
Mrs. Silas Grover
Mannington, WV
G79-7
Unfortunately, this name doesn't help.. if it were John that might be more intriguing to me. Anyway, my scanner is old and only scans up to 600. The scan resolution can be set to 1200 but the output resolution is max 600. I don't really get the point of scanning at 1200 if it can only be output at 600.
For your enjoyment (or curiosity), I posted the front of the post card on flickr at:
http://www.flickr.com/photos/10029128@N07/2933439530/
Nancy