When Willy saw his little cousin Sarah trying to hide her sparkling eyes, and her funny little laugh behind her mother's arm, he felt just as if somebody was tickling him. So he pinched his lips together very tight indeed, and cast his eyes up to the ceiling, and tried to look as grave as a judge. But it would not do; he burst out into such a fit of laughing, that every body else laughed too, and it was a long time before they could get their faces straight enough to eat their dinner.