"Miss Estill, I am longing to hear you render a Spanish solo; for I never can help the picture of a Castilian maiden playing amid the courts of the Alhambra, rising whenever you take the guitar," said young Warlow, in a low tone.

"My broken Spanish would soon dispel the illusion," she replied, with a soft blush; "but I will give you, instead, a poor translation of a Mexican song;" and in a voice rich with melody and feeling, she sang:—

"There blooms no rose upon the plain,
But costs the night a thousand tears,"—

while the guitar rained a shower of soft-dripping music, veined with a thrill of sadness. As her bosom rose and fell with the sweet strains, the ruby heart which clasped the ruff at her slender throat flashed rays of crimson and rose in the stray sunbeams that glinted through the room.

Clifford remained rapt in a reverie as the dreamy music, with a low minor ripple, died away, and the listeners sat in silence a moment, paying a mute tribute to the graceful singer who now was idly toying with the guitar.

One white arm was half revealed by the wide-flowing sleeve, with its fall of creamy lace; a cluster of fuchsias drooped among the waves of her hair, and the wide ruff gave a graceful finish to the close-fitting riding-habit of black velvet which she wore.

Young Warlow was aroused by his mother saying:—

"Miss Estill, the colonel, my husband."

He turned quickly, and saw his father standing in the doorway, staring as if he had seen a sheeted ghost. Yes; it was undeniable that the courtly and urbane colonel was positively staring with a white face at the beautiful guest, and as he came forward he said, in an agitated voice:—

"Ivarene? No—no—impossible! Pardon, Miss Estill; but your face reminds me so strongly of a dear, kind friend, 'who passed over the dark river long years ago,' that I was quite unnerved;" and as he held her slender hand he looked hungrily into the blue eyes that were regarding him with a look of shy wonder. When Hugh was presented, the colonel glanced keenly from the blonde, hazel-eyed young man back to the creole face of the young lady, and he again murmured brokenly, and in an incredulous tone, "Brother and sister? Strange—mystery!" and in the hearts of that group for many a day echoed and re-echoed his words: "Mystery, mystery!"