|Tom suggested using the cry of the peewit as a signal in Mystery At Witchend:-|
"You haven't got a secret signal yet and we ought to have.
We could use it for calling each other, or as a warning.
If you wanted me on club business you could just pass me
on the farm or in the lane and make the
sign and I'd know and come as soon as I could.
What do you think?"
"It's a grand idea, Tom. David was right when he said you'd make a good member. . . . But what sort of signal shall we have?"
"What about this?" said Tom. "I asked uncle what bird it was and he said it's called a peewit . . ." and with uncanny imitation he whistled the peewit's melancholy little cry.
Peter was thrilled. She knew more about birds than any of them, and this imitation was astonishingly good . . . so good that she could almost see the little bird dipping and drifting over fields, and crying sadly "Peee wit! . . . Peeeee wit."
The illustration above comes from Jane's Country Year.