Which preposition to use with galenas

against Occurrences 1%

To the east, were the more rugged walls of the upper and narrower end of the canyon; in their front, the beautiful Oak Knoll, with the dark steeps and pine-fringed crest of the Galenas against the sky; while to the west, the blue peaks of the far San Gabriels showed above the lower spurs and foothills of the more immediate range.

from Occurrences 1%

" "We will go around the head of Clear Creek, on the divide between this canyon and the Cold Water, to some peak in the Galenas from which we can see Fairlands; and where, with the field-glass, we can pick out some point at the upper end of Galena Valley, that we can both find later.

to Occurrences 1%

Conrad Lagrange explained that there were three ways back to the world they had left, nearly a month beforethe pipe-line trail to the reservoir and so down to the power-house and the Fairlands road; the Government trail from the pipe-line, over the Galenas to the valley on the other side; or, the Oak Knoll trail down to Clear Creek and out through the canyon gatesthe way they had come.

Which preposition to use with  galenas