"Long shanks" is slang for "long legs," and the valentine mocks the recipient for his tall stature. "Barnum" refers to P.T. Barnum, the circus founder., Text: Your little bullet head, and legs so very long / Remind me very strongly of a pair of tongs; / Your shape's so very odd, you really make me laugh; / I think if Barnum had you, he would call you the Giraffe., Provenance: McAllister, John A. (John Allister), 1822-1896, collector.