Since the Fighting Talk Forums seem to have a lot of flag designers, I'd like some help on source material for English Civil War cavalry cornets.
I've already got access to the Index Emblematicus, with has extensive listings of flags and cornets with emblems and mottos on them. The Index is especially useful for regiments like Waller's Horse and Balfour's Horse.
However, I'm not sure where to go looking for units that do not have a motto on their cornets.
So where would you suggest I look next?