'In the 1860s Major John Wesley Powell led a pioneering Grand Canyon expedition on this river'
the Colorado
MAJOR: In the 1860s Major John Wesley Powell led a pioneering Grand Canyon expedition on this river
In the 1860s Major John Wesley Powell led a pioneering Grand Canyon expedition on this river
In the 1860s Major John Wesley Powell led a pioneering Grand Canyon expedition on this river
MAJOR
the Colorado
MAJOR