This picture is for Suzanne, as my great big boys are not entirely unlike her little ones. My guys hung this above the sick couch in the kitchen, and they've finally told me why they raised the 'L' instead of the 'Q' for quarantine.
"Nancy wouldn't have a quarantine flag," said John. "She'd have the plague flag itself, squares of yellow and black."
"Let's make her one," said Titty. (- Winter Holiday page 113)
And no, we don't have plague or the mumps!