The very first day of my menagerial experience, the Mangouste got out of his cage while I was feeding him, and glided away into dark nooks and garrets unknown. I failed of recovering him by a stalking process among the giddy passes of the upper stairs; nor did he return that day to my often-repeated call; for I vociferated at intervals throughout the day the word "Mungo!" in a manner that must have led the mysterious inhabitants of that silent house to the conclusion that I was a spiritual medium, inviting revelations from the shade of the mighty Park.

A hot, clammy night. No balmy essences arise from the kennels of this hollow street in which I live; whatever comes from that quarter must be malarious, if anything. The windows are thrown open as far as they were made to be thrown, and I get as far out of one of them as I safely can, by tilting my chair back, and extending my legs out into that undefined everywhere called the wide, wide world. The only newspaper within reach of my hand is one I have already looked over, but I glance at it again, reading backwards from the end an account of a terrible poisoning case lately brought to light in England, which I had already read forwards from the beginning. Throwing it away from me in disgust, I reach out my other hand for a book. The one I lay hold of is "Laurel-Water," the melancholy drama of Sir Theodosius Boughton by insidious poisoner killed. I dashed it away, backwards, over my head, and, turning off the gas, abandoned myself to the strange influences that breathed hotly upon me from the clammy vegetation festering in the ropy night-air.

Why do civic wood-rangers choose the ailantus-tree for a bouquet-holder to the close-pent inhabitants of towns? Nothing can be more graceful, certainly, than the ellipses arched by the boughs from its taper stem. Few contrivances more umbrageous than the combination of its long, feathery foliations into its perfection of a parasol. But there are times in the dank, hot nights of midsummer, when the ailantus is but a diluted upas-antiar of Macassar, tainting, albeit with no deadly essence, the muggy air that rocks its slumbering branches and rolls away thence along the parapets and in at the windows of the sleepers. Dead-horse chestnut it might reasonably be called, because of its heavy, carrion smell, which, under the influences of a July night, is but too perceptible to the dwellers of streets where it abides. The tree at my window was an ailantus, of stately dimensions, and bounteous in a proportionate enormity of smell; yet it had never before affected me so much as on this night, when I lay dozing in the ghastly gloom. Sleep must have overcome me, for I had a troublous dream or vision of which Poison was the predominant nightmare,—a dream and slumber broken by the convulsive sensation which roused me up as I endeavored in imagination to swallow at one draught the contents of a metal tankard of half-and-half—half laurel-water, and half decoction of henbane—handed to me on a leaden salver by a demon-waiter, with a sprig of hemlock in the third buttonhole of his coat. This Lethean influence could hardly be that of the ailantus-tree alone. What of the plants on the balcony beneath,—the strange, rooty coilers which the mysterious planter sedulously fosters at the glooming of dusk, with a weird watering-pot held forth in a fawn-colored hand?

In a particular condition of the nerves,—say, when a man feels "shaky,"—it takes but little to convince him that anything which may possibly not be all right is to a moral certainty all wrong. To sleep another night in that room, with the windows open,—and who would shut his windows in July?—directly exposed to the exhalations of a rising forest of upas-antiars of Macassar, nurtured by the unwholesome hand of a mysterious vegetarian for purposes unavowed, was no longer to be thought of. De Vonville's room, which was at the back of the house, and had no fuming ailantus by its windows on which to browse nightmares of skunkish flavor, afforded a better climate for a night's rest, notwithstanding the singular ideas which these travelled men, especially naturalists, have of comfort, in a civilized sense. He invariably slept on the floor, converting his room, indeed, into the general semblance of a tent, by divesting it of all the appliances dear to a Christian gentleman, and one who loves to repose as such. Yet there was comparative freshness in that tent-like apartment, as I entered it that night, shutting the door of mine after me, to prevent ailantus and upas-antiar from following in my wake. The little beasts were all sleeping tranquilly in their cages, and the birds on their perches rested quietly, too,—excepting the old macaw, who cursed me in his sleep, as I lit up the gas. But the Mangouste had not returned, nor did I quite regret his absence for the present; because, although highly approving of the culture of four-footed beasts, be they large or small, I have a prejudice against having my jugular vein breathed, at midnight, by small animals of the weasel tribe,—an act of which Mungo, probably, would have been incapable. His relations will do such things, however, and newspapers recording appalling instances of it may be found.

Shutting the door, I turned the gas down to a mere spark, and stretched my weary limbs on the mat which served the travelled man for a bed, drawing over me a gauze-like fabric, which, I suppose, answers in tropical countries all the purposes of the more voluminous "bed-clothes" of ours. Sleep soon came upon me,—a heavy, but unquiet sleep, in which the same influences haunted me as those I felt when slumbering at the window. The malaria from the trees was there, and the planter of the balcony watering henbane and hellebore with boiling aquafortis; likewise the demon-waiter, with his leaden salver and poisoned tankard, wearing an ophidian smile on his features and a fresh sprig of hemlock in his third buttonhole.

How long I slept thus I know not. Once I had a vague sense of the Mangouste gliding across me, but it was only part of a dream; and it was still night, black and awful, when I started up in good earnest, at a piercing shriek from the united family of white mice, whose cage stood upon a low stand, about two yards to the right of where I lay.

The sound which followed this was one which the man is not likely to forget who has once heard it,—whether beneath his foot, as he steps upon the moss-grown log in the rank cedar-swamp, or under his hand, when about to grasp with it a ledge of the rocks among which he is clambering, unknowing of the serpent's dens. With clenched teeth, and hair that rustled like the sedge-grass, I rose and woke up the obedient gas, which flashed tremulously on the scales of an enormous rattlesnake coiled round the mice's cage, tightening his folds as he whizzed his infernal warning, and darting out his lightning tongue with baffled fury at the trembling group in the middle of the cage. This I saw by the first flash. Grasping a sword from among the weapons with which the walls were studded, I made a pass to sever the monster; but the Mangouste was quicker than I, as he darted upon the coils of the serpent, which, in a moment, fell heavily to the floor, a writhing, headless mass.

In the heavy dreams which haunted me during the sleep from which I had just been roused, I had a vision of the planter of the balcony with a snake coiled round his naked arm. Who so dull as to require an interpreter for such plain speakings? Rushing down-stairs, I burst open the door of that person's room with one kick, and there, in the middle of the floor, half-dressed and bending over a censer of red-hot charcoal, knelt Mr. Désolé Arcubus, the poison-man of Mrs. Silvernails boarding-house. His features were collapsed and livid, and he held his left arm, which was much swollen and discolored, close over the red-hot coals, basting it wildly, the while, with ladlefuls of some hot liquid, while he crammed into his mouth, at intervals, a handful of herb-fodder of some kind from a salad-bowl on the floor beside him. He was rapidly growing faint and sinking, but indicated his wishes by signs, and one of several strangers who now entered the room continued the fomenting treatment, while another ran for medical assistance.

There was an open letter on the table, which I had no hesitation in reading, when I saw at a glance that it threw light on the matter. The following is an exact copy of it:—

"Hollow Rock——County. N. Y. 17 Jewly. 18—