This incomplete work is usually known as "Fragment, or the Triumph of Conscience" in the version published in Original Poetry by Victor and Cazire, the volume of poems published by Shelley and his sister Elizabeth in 1810; "original" is a bit disingenuous, as the volume had to be suppressed when it was discovered one of the poems was a rip-off of a Matthew Lewis poem.
Shelly then slightly altered the "Fragment" and included it in his second Gothic novel, St. Irvyne, or The Rosicrucian, published in 1811. (Most of the changes are minor modifications of punctuation, although the first version has this line 17: "Her right hand a blood reeking dagger was bearing.") This latter version, reproduced below, is usually identified as "Victoria."
Thanks to Frank T. Zumbach, of Munich, Germany, who provided this etext to LitGothic; headnote and minor emendations added by LitGothic.
`Twas dead of the night, when I sat in my dwelling;
One glimmering lamp was expiring and low;
Around, the dark tide of the tempest was swelling,
Along the wild mountains night-ravens were yelling —
They bodingly presaged destruction and woe.5
`Twas then that I started! — the wild storm was howling,
Nought was seen, save the lightning, which danc'd in the sky;
Above me, the crash of the thunder was rolling,
And low, chilling murmurs, the blast wafted by.
My heart sank within me — unheeded the war 10
Of the battling clouds, on the mountain-tops, broke; —
Unheeded the thunder-peal crash'd in mine ear —
This heart, hard as iron, is stranger to fear;
But conscience in low, noiseless whispering spoke.
`Twas then that her form on the whirlwind upholding, 15
The ghost of the murder'd Victoria strode;
In her right hand, a shadowy shroud she was holding, 17
She swiftly advanced to my lonesome abode.
I wildly then called on the tempest to bear me —