Eliot's 'Burbank with a Baedeker: Bleistein with a Cigar.' (T.S. Eliot)

Most of the allusions contained in T.S. Eliot's 'Burbank with a Baedeker: Bleistein with a Cigar' have been uncovered, except for the phrase 'the seven laws.' Critics Laura Riding and Robert Graves asserted that the phrase's meaning could be discovered in Baedeker, the Classical Dictionary or the 'Merchant of Venice.' They stressed that this allusion illustrates the limited humorous appeal of modernist verse. Meanwhile, Elizabeth Drew and John Ruskin argued that the phrase alluded to the 'Seven Lamps of Architecture' and refered to seven moral-aesthetic principles.
. . . Who clipped the lion's wings And flea'd his rump and pared his claws? Thought Burbank, meditating on Time's ruins, and the seven laws. (Complete Poems 29-32) T. [...]