Everything was dark and disturbing about her; blue vapors were rising from the ground and changing shape.

Rendered unconscious by that unearthly blue vapor, then shipped halfway around the world before waking here?

Whatever that odorless blue vapor was, it wasn't smoke.

He heard a foaming sound; and then blue vapour rose to his nostrils.

Then the night came up in dark blue vapour from the snow.

In the middle of his performance, the blue vapour leaves Mrs. Peace and scares the audience away.

A blue vapor rose from it, and the troglas pressed closer.

It is all but tales of Swevenham, a blue vapour hanging on the mountains yonder!

They sat silent, and the smoke from their pipes joined amicably in a blue vapor above their heads.

From below, the strange blue vapor of the blast was rushing upward.