Question

Half heaven was pure and stainless: the clouds, now trooping before the wind, which had shifted to the west, were filing off eastward in long, silvered columns.

Accepted Answer

La mitad del cielo estaba azul y límpido. Las nubes, impulsadas por el viento, desaparecían, formando grandes y argentadas masas, en el horizonte.

Back	Half heaven was pure and stainless: the clouds, now trooping before the wind, which had shifted to the west, were filing off eastward in long, silvered columns.
Front	La mitad del cielo estaba azul y límpido. Las nubes, impulsadas por el viento, desaparecían, formando grandes y argentadas masas, en el horizonte.

Y El Half Heaven Pure Stainless Clouds Trooping