Leaving the first collection of tumuli, the road wound away smooth and uniform through the level prairie, with here and there upon the left a slight elevation from its low surface, seeming a continuation of the group behind, or a link of union to those yet before. It was a sweet afternoon; the atmosphere was still and calm, and summer's golden haze was sleeping magnificently on the far-off bluffs. At intervals the soft breath of the "sweet South" {158} came dancing over the tall, glossy herbage, and the many-hued prairie-flowers flashed gayly in the sunlight. There was the _heliotrope_, in all its gaudy but magnificent forms; there the deep cerulean of the fringed _gentiana_, delicate as an iris; there the mellow gorgeousness of the _solidago_, in some spots along the pathway, spreading out itself, as it were, into a perfect "field of the cloth of gold;" and the balmy fragrance of the aromatic wild thyme or the burgamot, scattered in rich profusion over the plain, floated over all. Small coveys of the prairie-fowl, _tetrao pratensis_, a fine species of grouse, the ungainly form of the partridge, or that of the timid little hare, would appear for a moment in the dusty road, and, on my nearer approach, away they hurriedly scudded beneath the friendly covert of the bright-leaved sumach or the thickets of the rosebush. Extensive groves of the wild plum and the crab-apple, bending beneath the profusion of clustering fruitage, succeeded each other for miles along the path as I rode onward; now extending in continuous thickets, and then swelling up like green islets from the surface of the plain, their cool recesses affording a refreshing shade for the numerous herds. The rude farmhouse, too, with its ruder outbuildings, half buried in the dark luxuriance of its maize-fields, from time to time was seen along the route. After a delightful drive of half an hour the second group of eminences, known as the "Cantine Mounds," appeared upon the prairie at a distance of three or four miles, the celebrated "Monk Hill," largest monument of the kind yet discovered in North America, heaving up its giant, forest-clothed {159} form in the midst.[128] What are the reflections to which this stupendous earth-heap gives birth? What the associations which throng the excited fancy? What a field for conjecture! What a boundless range for the workings of imagination! What eye can view this venerable monument of the past, this mighty landmark in the lapse of ages, this gray chronicler of hoary centuries, and turn away uninterested?