The blister, in other words, is chambered, and each chamber must be opened to evacuate the whole of the contents.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Frequently this argument has taken a slightly different form: that instead of unfriendly pre-Celtic peoples it was magic-working Druids who-either through their own choice or else, having been driven to bay by the spread of Christianity, through force of circumstances-dwelt in secret in chambered mounds or souterrains, or in dense forests, and then stole young people for recruits, sometimes permitting them, years afterwards, when too old to be of further use, to return home under an inviolable vow of secrecy.
"The Fairy-Faith in Celtic Countries"
W. Y. Evans Wentz
The distribution of the blood is controlled by the heart, a great four-chambered pump.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair