I think that in delaying in mentioning the American colonies, Jefferson reveals his reluctance/lack of confidence in them and their fight for independence.
(*I didn't really know the context(I assume Thomas Jefferson), but just from a general character/human personality perspective, I believe this applies*).
Hope this helps! :)
All the land South of the Great Lakes and East of the Mississippi River (except Florida - that went to Spain).
Answer:
Mona Lisa
The last supper
Sistine Chapel Ceiling
The birth of Venus
The school of Athens
The sistine Madonna
Primavera
Assumption of the virgin
Kiss of Judas
Girl with a pearl earring