Hal, Bill, and Senor Guacamole,
The map Hal is referring to is better known as the "Venegas Map of 1757". It was drawn by Father Mauel Venegas SJ for the King of Spain. Here is a good sized image:
View attachment 1312123
(keep clicking, as it gets HUGE)
For Senor Guacamole,
Check out this screenshot from The Ortelius Map of America from 1572:
View attachment 1312140
You may notice a couple of interesting things on it;
1. In the upper left area colored yellow, you will see an interesting name: "Astatlan" (kind of similar to Aztlan, huh?). THIS Astatlan lies somewhere in Northwest Mexico or far Southwest US, but it appears to be Southeast of the Colorado River.
2. Just below the "N" in "HISPANIA" (also in yellow area) is a name you might recognize; "TOPIRA"
3. And on the big map below, you can see that Quivira is West of the Colorado River!
Here is the complete map:
View attachment 1312141
Mike