A Quote by Dr. Samuel Johnson on sleep and water
Lichfield, England. Swallows certainly sleep all winter. A number of them conglobulate together, by flying round and round, and then all in a heap throw themselves under water, and lye in the bed of a river.
Source: James Boswell The Life of Samuel Johnson, LL.D., 3rd Edn., Malone, London, 1799
Contributed by: Zaady