"The man is no more a phantom than yourself. The only marvel is, how he comes to be hiding himself in the catacomb. Possibly our guide might solve the riddle."

The spectre himself here settled the point of his tangibility, at all events, and physical substance, by approaching a step nearer, and laying his hand on Kenyon's arm.

"Inquire not what I am, nor wherefore I abide in the darkness," said he, in a hoarse, harsh voice, as if a great deal of damp were clustering in his throat. "Henceforth, I am nothing but a shadow behind her footsteps. She came to me when I sought her not. She has called me forth, and must abide the consequences of my reappearance in the world."

"Holy Virgin! I wish the signorina joy of her prize," said the guide, half to himself. "And in any case, the catacomb is well rid of him."

We need follow the scene no further. So much is essential to the subsequent narrative, that, during the short period while astray in those tortuous passages, Miriam had encountered an unknown man, and led him forth with her, or was guided back by him, first into the torchlight, thence into the sunshine.

It was the further singularity of this affair, that the connection, thus briefly and casually formed, did not terminate with the incident that gave it birth. As if her service to him, or his service to her, whichever it might be, had given him an indefeasible claim on Miriam's regard and protection, the Spectre of the Catacomb never long allowed her to lose sight of him, from that day forward. He haunted her footsteps with more than the customary persistency of Italian mendicants, when once they have recognized a benefactor. For days together, it is true, he occasionally vanished, but always reappeared, gliding after her through the narrow streets, or climbing the hundred steps of her staircase and sitting at her threshold.

Being often admitted to her studio, he left his features, or some shadow or reminiscence of them, in many of her sketches and pictures. The moral atmosphere of these productions was thereby so influenced, that rival painters pronounced it a case of hopeless mannerism, which would destroy all Miriam's prospects of true excellence in art.

The story of this adventure spread abroad, and made its way beyond the usual gossip of the Forestieri, even into Italian circles, where, enhanced by a still potent spirit of superstition, it grew far more wonderful than as above recounted. Thence, it came back among the Anglo-Saxons, and was communicated to the German artists, who so richly supplied it with romantic ornaments and excrescences, after their fashion, that it became a fantasy worthy of Tieck or Hoffmann. For nobody has any conscience about adding to the improbabilities of a marvellous tale.

The most reasonable version of the incident, that could anywise be rendered acceptable to the auditors, was substantially the one suggested by the guide of the catacomb, in his allusion to the legend of Memmius. This man, or demon, or man-demon, was a spy during the persecutions of the early Christians, probably under the Emperor Diocletian, and penetrated into the catacomb of St. Calixtus, with the malignant purpose of tracing out the hiding-places of the refugees. But, while he stole craftily through those dark corridors, he chanced to come upon a little chapel, where tapers were burning before an altar and a crucifix, and a priest was in the performance of his sacred office. By divine indulgence, there was a single moment's grace allowed to Memmius, during which, had he been capable of Christian faith and love, he might have knelt before the cross, and received the holy light into his soul, and so have been blest forever. But he resisted the sacred impulse. As soon, therefore, as that one moment had glided by, the light of the consecrated tapers, which represent all truth, bewildered the wretched man with everlasting error, and the blessed cross itself was stamped as a seal upon his heart, so that it should never open to receive conviction.

Thenceforth, this heathen Memmius has haunted the wide and dreary precincts of the catacomb, seeking, as some say, to beguile new victims into his own misery; but, according to other statements, endeavoring to prevail on any unwary visitor to take him by the hand, and guide him out into the daylight. Should his wiles and entreaties take effect, however, the man-demon would remain only a little while above ground. He would gratify his fiendish malignity by perpetrating signal mischief on his benefactor, and perhaps bringing some old pestilence or other forgotten and long-buried evil on society; or, possibly, teaching the modern world some decayed and dusty kind of crime, which the antique Romans knew,—and then would hasten back to the catacomb, which, after so long haunting it, has grown his most congenial home.

Miriam herself, with her chosen friends, the sculptor and the gentle Hilda, often laughed at the monstrous fictions that had gone abroad in reference to her adventure. Her two confidants (for such they were, on all ordinary subjects) had not failed to ask an explanation of the mystery, since undeniably a mystery there was, and one sufficiently perplexing in itself, without any help from the imaginative faculty. And, sometimes responding to their inquiries with a melancholy sort of playfulness, Miriam let her fancy run off into wilder fables than any which German ingenuity or Italian superstition had contrived.

For example, with a strange air of seriousness over all her face, only belied by a laughing gleam in her dark eyes, she would aver that the spectre (who had been an artist in his mortal lifetime) had promised to teach her a long-lost, but invaluable secret of old Roman fresco painting. The knowledge of this process would place Miriam at the head of modern art; the sole condition being agreed upon, that she should return with him into his sightless gloom, after enriching a certain extent of stuccoed wall with the most brilliant and lovely designs. And what true votary of art would not purchase unrivalled excellence, even at so vast a sacrifice!

Or, if her friends still solicited a soberer account, Miriam replied, that, meeting the old infidel in one of the dismal passages of the catacomb, she had entered into controversy with him, hoping to achieve the glory and satisfaction of converting him to the Christian faith. For the sake of so excellent a result; she had even staked her own salvation against his, binding herself to accompany him back into his penal gloom, if, within a twelvemonth's space, she should not have convinced him of the errors through which he had so long groped and stumbled. But, alas! up to the present time, the controversy had gone direfully in favor of the man-demon; and Miriam (as she whispered in Hilda's ear) had awful forebodings, that, in a few more months, she must take an eternal farewell of the sun!

It was somewhat remarkable that all her romantic fantasies arrived at this self-same dreary termination,—it appeared impossible for her even to imagine any other than a disastrous result from her connection with her ill-omened attendant.

This singularity might have meant nothing, however, had it not suggested a despondent state of mind, which was likewise indicated by many other tokens. Miriam's friends had no difficulty in perceiving that, in one way or another, her happiness was very seriously compromised. Her spirits were often depressed into deep melancholy. If ever she was gay, it was seldom with a healthy cheerfulness.