"Humph!" said Walter; "I guess what it is.  It's a new scheme for paying off the national debt, by turning radishes into sovereigns and cabbage- leaves into bank-notes; and it'll take a deal of time and pains to do it."  He laughed furiously at his own wit, but, to his mortification, he laughed alone.  There was a rather painful silence, which was broken by the gentle voice of Miss Huntingdon.