Chesterfield Junior 1844 - which sire and granddam?

[cissiny]

Hi all, I have a stallion called Chesterfield Junior in my database, he was used in French breeding. I have his pedigree, but I am not sure about which sire and granddam to choose?

Chesterfield Junior, born 1844 (probably in GB and exported to France)
sire: Chesterfield (which one?)
dam: Glaucus mare
damsire: Glaucus (must be the one by Partisan ex Nanine I think)
dam's dam: The Nun (which one?)

I have the French studbooks volume I to V, but I suppose he's in volume VI or VII...

Any ideas?

Thanks in advance,
Cissi