What is a 'Lamas Lamb'?: What native plant connects sheep with money? and Who has let the sheep go into the meadows? The theme is 'Sheep for the 3 answers-thanks if you can help.
A extract from this book suggests it might be applied to children as well...
"Little Polly, when she arrived, was adored by the whole family...
She was what was known there as a Lammas lamb, the last,
late-comer, of a family..."
http://gutenberg.net.au/ebooks09/0900901.txt
Shepherd's Purse is the connection between sheep and money. It has tiny heart-shaped seedpods which were once thought to resemble medieval shepherds' bags.