A variant of the poem also appears in both Poems by John G. Saxe (Boston: Ticknor and Fields, 1856) pg. 98 and Cyclopaedia of Wit and Humor (edit. William E. Burton, NY: D. Appleton and Co., 1858) pg. 388.
ON AN UGLY PERSON SITTING FOR A
AN EPIGRAM BY SAXE
HERE nature in her glass,the wanton elf,
Sits gravely making faces at herself;
And while she scans each clumsy feature o'er,
Repeats the blunders that she made before!
(The epigram also appeared in the short tale, "Removing the Traces" in Appleton's Journal 9:201 (25 January 1873) pp. 146-148. End of text. Please refer to our textnote regarding this text.)