Twinkle, Twinkle Little Words. Katherine Mansfield's Gaze into Childhood

If you can't go to the woods, if you can't go to the sea, if you can't cut out a frame of your window, if you can't keep the wild in you, then leaf through The garden Party, open it anywhere and you 'll pick up emerald green treasures twinkling like small epiphanies high above the greyish fragments of your urban day. 

Pip took something out of his pocket, rubbed it a long time on the front of his jersey, then breathed on it and rubbed it again.
"Now turn round!" he ordered.
They turned round.
"All look the same way! Keep still! Now!"
And his hand opened; he held up to the light something that flashed, that winked, that was a most lovely green. 
"It's a nemeral," said Pip solemnly.
"Is it really, Pip?" Even Isabel was impressed. 
The lovely green thing seemed to dance in Pip's fingers. Aunt Beryl had a nemeral in a ring, but it was a very small one. This one was as big as a star and far more beautiful. 

Katherine Mansfield, At the Bay 

Images 1- Found on flickr with no name
Image 2- Book cover of Katherine Mansfield, The Garden Party, Harper Collins Publishers, 2016
Impossible to find the illustrator's name so far. Any clue?