You quote me fairly, Carnkie, however it was a quick generalisation in relation to the general British colonies that became the USA.
Here we have a picture purporting to be Florida in 1591. In this case it would be Spanish. I don't know either of the artists mentioned but it should be borne in mind that the Spanish had a great belief in the myth of Cibola, the Seven Cities of Gold. This myth permeated large areas of their culture including alot of their visual art.
The myth of Cibola drove Cortes, Soto, Coronada and Cabeza de Vaca. They never found it, of course, but left a trail of devastation.
The picture, it could be said, tells us more about the artists than it does about indigenous Americans!