Great Regulars: In the poem's most famous line,

"I have forgot much, Cynara! gone with the wind," the subject of "gone with the wind" appears to be "I", not Cynara. This stanza reveals the lover's frantic onward movement, his dance of death. That Cynara is ever-present, in spite of everything, is all the poem wants to say, the whole of its simple story. Getting to the refrain is what matters, riding the delirious emotional sweep from "passion" to "fashion", obsessively re-igniting the old flame.

from Carol Rumens: The Guardian: Books blog: Poem of the week: Non sum qualis eram bonae sub regno Cynarae by Ernest Dowson

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