First of all, rhythm. It originally accompanied the motion of the cradle. In literature, it’s represented by (exact) rhymes, regular stresses, enumerations and, most of all, repetitions (parallelisms of composition, meaning, vocabulary or syntax). A fragment from Iwona Chmielewska’s picture book Kołysanka na cztery (A Four-Bar Lullaby) brilliantly exemplifies the principle of rhythmicity:
How many corners on a cushion?
As many corners as a blanket.
How many corners on a book?
As many corners as a cushion.
We tuck in your little blanket,
we put away your little book.
Close your eyes – one and two.
Close your ears – three and four.
[trans. AP]
This literary lullaby, unusual because it is adorned with eloquent imagery, additionally includes the ritual of counting down before falling asleep. The sequence of ‘one, two, three, four’ complements every action described, sounds fade out, the act of reading that’s concluded by closing the book implies the next step: sleep.
Second, onomatopoeias. The words should be selected in such a way that they imitate, at least to some degree, the sounds of nature and those emitted by objects. Another substitute for musicality in the poetic lullaby is glossolalia, that is, sequences of sounds imitating the words of a particular language but devoid of any meaning. Echolalia, in turn, at later stages of human development considered a symptom of intellectual impairment, refers to the repetition of overheard words or fragments of sentences. Although as a literary form the lullaby loses its original connection to song and isn’t necessarily meant to be read aloud, it nevertheless retains certain properties of a melic poem whose structure is subordinated to the rhythmicity of language. The melodiousness is further reinforced [in Polish] by appropriately selected fricatives, semivowels, palatal and palatalised sounds:
Luli, luli,
Niemowlątko.
Luli, luli,
Śpij, słoniątko.
(Rock-a-bye,
My little infant,
Rock-a-bye
Sleep, little elephant.)
[a lullaby from the ‘luli, luli…’ (rock-a-bye…) anthology, selected by Jolanta Kowalczykówna, trans. AP]
In the example above, the repetition of the ‘l’ sound makes for the melodious lilt of the lines. The same effect was employed by Konstanty Ildefons Gałczyński:
Rock-a-bye my little son,
sleep in your rose cradle –
I shall rock you gently,
close your little eyes.
[trans. AP]
… and we shall quote Kołysanka pisarzy (Writers’ Lullaby) no further than this fragment, because further on, the poet reveals his satirical side, referring to the political situation of his country and to people of letters being the lapdogs of the authorities.