This section is from the book "The Home Cyclopedia Of General Information", by Charles Morris. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
[Gk. kata, downward; kymbe, cavity.] Great excavations in the vicinity of ancient Rome, used for burial by the early Christians. They are cut in a soft volcanic material, and the total length of their galleries is at least 300 or 400 miles.
Cat'bird- An American bird allied to the Mocking-bird, and possessing a remarkable power of imitating the notes of other birds. Its spring song is mellow and sweet, but it has also a disagreeable note, somewhat like the mew of a cat. It is found in the eastern half of the United States.
 
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