Clare Marie Veronica Leighton (April 12, 1898-November 4, 1989) was an English/American artist, writer, and illustrator, best known for her wood engravings.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Clare_Leighton
Blackbird on Nest, from the Series: Four Hedges by Clare Leighton
1935 / Wood engraving / Image: 6 15/16″x4 7/8″
Various collections, including Philadelphia Museum of Art, PA
Clare Leighton on Artnet: http://www.artnet.com/artists/clare-leighton/