Whoever has made a voyage up the Hudson must re-member the Kaatskill mountains. They are a dismem-bered branch of the great Appalachian family, and are seen away to the west of the river, swelling up to a no-ble height, and lording it over the surrounding country. Every change of season, every change of weather, in-deed, every hour of the day, produces some change in the magical hues and shapes of these mountains, and they are regarded by all the...