They are "The Iron Heel" and "The Cruise of the Snark."

VOA: special.2010.05.21

Here it is; it's in your anthology as well: I made my song a coat Covered with embroideries Out of old mythologies From heel to throat; But the fools caught it, Wore it in the world's eye As though they'd wrought it.

你们选集里有这首：,我为我的歌儿缝就,一件长长的外套,上面缀满剪自古老,神话的花边刺绣；,但蠢人们把它抢去，穿上在人前炫示,俨然出自他们之手。

耶鲁公开课 - 现代诗歌课程节选

He says their research has identified an "Achilles' heel" of the parasite - an enzyme that is needed for the parasite's survival.

VOA: standard.2010.04.05