And through these forests, the observer looks down the steep mountain-sides to the Rangeet River only 1000 feet above sea-level, and then up and up through tier after tier of forest-clad ranges, each bathed in a haze of deeper and deeper purple, till the line of snow is reached; and then still up to the summit of Kangchenjunga, now so pure and ethereal we can scarcely believe it is part of the solid earth on which we stand; and so high it seems part of the very sky itself."