This Sahara rock, with its rills and weathered smoothness, its differing colors and textures, is what she calls a thunder egg. The name sounds like it should be from the Marvel universe, ...

Thy rocks and rills. By Elizabeth Coatsworth. April 14, 1933. Save this story. Save this story. The New Yorker, April 22, 1933 P. 32. Now of the quick New England spring. View Article ...