I hear its voice at the window.
Siren songs it sings in the willow.
The road keeps calling — echoes on the wind,
and winds on until dawn.
Byr a Toddaid – a 4-line stanza Welsh form consisting of a single quatrain or a series of quatrains, each divided into 2 combined couplets. One couplet is 2 lines, eight syllables each with an AA end rhyme. The other couplet is 2 lines, one with 10 syllables and an end rhyme NEAR the end, and the other line with 6 syllables with a link to the end word of the 10 syllable line, then an end rhyme that corresponds to the end rhyme in the same 10 syllable line. The link is near the front of the 6 syllable line, and can be rhyme, alliteration or some other clever device to link the two words. Couplets can alternate, so there are 2 main options indicated in the outline a below: