Mantled, indeed.

"From an elevated point of their march through this region, the travellers caught a beautiful view of the Powder River Mountains away to the north, stretching along the very verge of the horizon, and seeming, from the snow with which they were mantled, to be a chain of small white clouds, connecting sky and earth."

~Washington Irving, "The Adventures of Captain Bonneville, U.S.A., in the Rocky Mountains and the far West".