Here the expedition was divided. The first and third divisions were to cross the river and proceed southwesterly, by way of the Raton Mountains and Fort Union, to Santa Fé; while Mr. Hobart was to take the second still farther up the Arkansas Valley, and almost due west to the famous Sangre de Cristo Pass through the mountains, just north of the Spanish Peaks. For two weeks longer they worked their way slowly but steadily across the burning Plains, towards the mountains that almost seemed to recede from them as they advanced; though each day disclosed new peaks, while those already familiar loomed up higher and grander with every mile. Finally they were so near at hand that the weary toilers, choked with the alkaline dust of the Plains, and scorched with their fervent heat, could feast their eyes on the green slopes, cool, dark valleys, and tumbling cascades, rushing down from glittering snow-fields. How they longed to be among them, and with what joy did they at length leave the treeless country of which they were so tired and enter the timbered foot-hills!