Englyn byr cwca is a shortened crooked rhyme and is not one of the 24 Official Welsh Meters.
Englyn bry cwca is:
• stanzaic, written in any number of tercets.
• syllabic, 7-10-6 syllable lines.
• rhymed, rhyme scheme aba, cdc, etc. The L2 end rhyme appears internally midway in L3.
x x x x x x a
x x x x x x x x x b
x x b x x a
A Look Forward byJudi Van Gorder
Vows, “in sickness and in health”,
they’re hard to see when strong and young in love,
time is part of the wealth.
But years turn and visions blur,
the body slows and vitality goes,
hopes and woes are deferred.
Here we are in winter’s dawn,
through grace or luck our days continue bright.
We shun the night upon
which one life will first depart.
Only “death and taxes” they say, “are sure”.
mature, we play our part.
Pasted from http://www.poetrymagnumopus.com/index.php?showtopic=960\
My thanks to Judi Van Gorder for years of work on this fine PMO resource.