Have you ever looked at the entire roll for your gg grandfathers unit ? I'd be interested to know if few muster rolls survive for his company, or if some men have many cards. How did you find out he served ? Did he apply for a pension ?
Are some companies known to have kept more complete records than others or do the problems with missing cards occur even within companies on a man to man basis vs a unit to unit basis ?
Thanks,
D.W.