I acknowledge, when the fortiter in re faltered before so terrible an enemy; but the love of natural science bore me up, and brought me off in triumph!”

“You speak a language so different from that we use in Tennessee,” said Ellen, struggling to conceal her laughter, “that I hardly know whether I understand your meaning. If I am right, you wish to say you were chicken-hearted.”

“An absurd simile drawn from an ignorance of the formation of the biped. The heart of a chicken has a just proportion to its other organs, and the domestic fowl is, in a state of nature, a gallant bird. Ellen,” he added, with a countenance so solemn as to produce an impression on the attentive girl, “I was pursued, hunted, and in a danger that I scorn to dwell on— what’s that?”

Ellen started; for the earnestness and simple sincerity of her companion’s manner had produced a certain degree of credulity, even on her buoyant mind. Looking in the direction indicated by the Doctor, she beheld, in fact, a beast coursing over the prairie, and making a straight and rapid approach to the very spot they occupied. The day was not yet sufficiently advanced to enable her to distinguish its form and character, though enough was discernible to induce her to imagine it a fierce and savage animal “It comes! it comes!” exclaimed the Doctor, fumbling, by a sort of instinct, for his tablets, while he fairly tottered on his feet under the powerful efforts he made to maintain his ground. “Now, Ellen, has fortune given me an opportunity to correct the errors made by star-light,—hold,—ashy-plumbeous,—no ears,—horns, excessive.” His voice and hand were both arrested by a roar, or rather a shriek from the beast, that was sufficiently terrific to appal even a stouter heart than that of the naturalist. The cries of the animal passed over the prairie in strange cadences, and then succeeded a deep and solemn silence, that was only broken by an uncontrolled fit of merriment from the more musical voice of Ellen Wade. In the mean time the naturalist stood like a statue of amazement, permitting a well-grown ass, against whose approach he no longer offered his boasted shield of light, to smell about his person, without comment or hinderance.

“It is your own ass,” cried Ellen, the instant she found breath for words; “your own patient, hard working, hack!”

The Doctor rolled his eyes from the beast to the speaker, and from the speaker to the beast; but gave no audible expression of his wonder.

“Do you refuse to know an animal that has laboured so long in your service?” continued the laughing girl. “A beast, that I have heard you say a thousand times, has served you well, and whom you loved like a brother!”

“Asinus Domesticus!” ejaculated the Doctor, drawing his breath like one who had been near suffocation. “There is no doubt of the genus; and I will always maintain that the animal is not of the species, equus. This is undeniably Asinus himself, Ellen Wade; but this is not the Vespertilio Horribilis of the prairies! Very different animals, I can assure you, young woman, and differently characterized in every important particular. That, carnivorous,” he continued, glancing his eye at the open page of his tablets; “this, granivorous; habits, fierce, dangerous; habits, patient, abstemious; ears, inconspicuous; ears, elongated; horns, diverging, &c., horns, none!”

He was interrupted by another burst of merriment from Ellen, which served, in some measure, to recall him to his recollection.

“The image of the Vespertilio was on the retina,” the astounded enquirer into the secrets of nature observed, in a manner that seemed a little apologetic, “and I was silly enough to mistake my own faithful beast for the monster. Though even now I greatly marvel to see this animal running at large!”

Ellen then proceeded to explain the history of the attack and its results. She described, with an accuracy that might have raised suspicions of her own movements in the mind of one less simple than her auditor, the manner in which the beasts burst out of the encampment, and the headlong speed with which they