In 1765, a second outbreak killed approximately 12,000 more, and then spread westward through the tribes of the Chaco.

The witness said he then saw the flames spreading westward.

Between 10:05 and 10:25, videos show, fire spread westward across the 92nd floor's north face, bearing down on their western refuge.

The spirit of cooperation beyond state lines soon spread westward.

The colony prospers, buys more land from the Indians, and spreads westward.

Browne's competition was spread westward over several hundred miles.

The adelgids were spotted on Long Island in 1984, and began spreading westward.

As the 18th Century continued, settlers spread both northward and westward.

Gray visibility was spreading westward slowly, like an ebb tide.

Why does the northern China strain - the one now spreading westward - turn up so many false negatives in diagnostic tests?