#let poem(content) = {
  set par(first-line-indent: 0em)

  align(center, block[
    #set align(left)
    #set block(breakable: false)
    #emph(content)
  ])
}

#poem[
  #block[
    “I passed by his garden, and marked, with one eye, \
    How the Owl and the Panther were sharing a pie---”
  ]

  #block[
    [later editions continued as follows \
    The Panther took pie-crust, and gravy, and meat, \
    While the Owl had the dish as its share of the treat. \
    When the pie was all finished, the Owl, as a boon, \
    Was kindly permitted to pocket the spoon: \
    While the Panther received knife and fork with a growl, \
    And concluded the banquet---]
  ]
]