"A side ditch should have a gradually falling and even grade at the bottom, and broad, flaring sides to prevent the Caving in of its banks.
"The Future of Road-making in America"
Archer Butler Hulbert
The thing was not like bullets, but as the earth Caving under them.
"The Missourian"
Eugene P. (Eugene Percy) Lyle
Wondering why his stomach seemed to be Caving in so, he tactfully began.
"The Old Gray Homestead"
Frances Parkinson Keyes