"The Raven" was praised by fellow writers William Gilmore Simms and Margaret Fuller, though it was denounced by William Butler Yeats, who called it "insincere and vulgar... its execution a rhythmical trick". Transcendentalist Ralph Waldo Emerson said, "I see nothing in it." A critic for the Southern Quarterly Review wrote in July 1848 that the poem was ruined by "a wild and unbridled extravagance" and that minor things like a tapping at the door and a fluttering curtain would only affect "a child who had been frightened to the verge of idiocy by terrible ghost stories". An anonymous writer going by the pseudonym "Outis" suggested in the New York Evening Mirror that "The Raven" was plagiarized from a poem called "The Bird of the Dream" by an unnamed author. The writer, who wrote the article as a response to Poe's accusations of plagiarism against Henry Wadsworth Longfellow, showed 18 similarities between the poems. It has been suggested Outis was really Cornelius Conway Felton, if not Poe himself. After Poe's death, his friend Thomas Holley Chivers said "The Raven" was plagiarized from one of his poems. In particular, he claimed to have been the inspiration for the meter of the poem as well as the refrain "nevermore".