Interesting - not easily found, but it seems that it does exist. You can learn something new every day!
So now we have, more or less, cracked the Limerick rhyme scheme, can we please try to learn its rhythm - which is somewhat like this:
Di dah/ diddy dah/ diddy dada
Di dah/ diddy dah/ diddy dada
Di dah/ diddy dah
Di dah/ diddy dah
Di dah/ diddy dah/ diddy dada