three o'clock
`` I can tell distance and time all right today . Do you see what you 're up against ? '' Ralph pointed to the towering San Bernardinos . `` It 's horseback from here and we ought to be there by three o'clock anyway . '' At the mouth of the cañon , Ralph explained the dam that was being built across the river and the heavy gates that were being put in . `` You see we let the water come from the reservoir as far as this , in its natural bed . If anything should happen along the canal we can shut off the water at this point first .