806, and in 1808 it
was made over by Napoleon to the grand-duke of Berg, and became the
chief town of the department of Ruhr. Through the cession of Westphalia
by the king of the Netherlands, on the 31st of May 1815, it became a
Prussian town.

See Thiersch, _Geschichte der Freireichsstadt Dortmund_ (Dort, 1854),
and Ludoff, _Bau- und Kunstdenkmaler in Dortmund_ (Paderborn, 1895);
also A. Shadwell, _Industrial Efficiency_ (London, 1906).

DORY, or JOHN DORY (_Zeus faber_), an Acanthopterygian fish, the type of
the family _Zeidae_, held in such esteem by the ancient Greeks that they
called it _Zeus_ after their principal divinity. Its English name is
probably a corruption of the French _jaune doree_, and has reference to
the prevailing golden-yellow colour of the living fish. The body in the
dory is much compressed, and is nearly oval in form, while the mouth is
large and capable of extensive protrusion. It possesses two dorsal fins,
of which the anterior is armed with long slender spines, and the
connecting membrane is produced into long tendril-like filaments; while
a row of short spines extends along the belly and the roots of the anal
and dorsal fins. The colour of the upper surface is olive-brown; the
sides are yellowish, and are marked with a prominent dark spot, on
account of which the dory divides with the haddock the reputation of
being the fish from which Peter took the tribute money. It is an
inhabitant of the Atlantic coasts of Europe, the Mediterranean and the
Australian seas. It is occasionally abundant on the coasts of Devon and
Cornwall, and is also found, though more sparingly, throughout the
British seas. It is exceedingly voracious, feeding on molluscs, shrimps
and the young of other fish; and Jonathan Couch (1789-1870), author of a
_History of British Fishes_, states that from the stomach of a single
dory he has taken 25 flounders, some 2-1/2 in. long, 3 fatherlashers half
grown and 5 stones from the beach, one 1-1/2 in. in length. They are often
taken in the fishermen's nets off the Cornwall and Devon coast, having
entered these in pursuit of pilchards. They are seldom found in deep
water, preferring sandy bays, among the weeds growing on the bottom of
which they lie in wait for their prey, and in securing this they are
greatly assisted by their great width of gape, by their power of
protruding the mouth, and by the slender filaments of the first dorsal
fins, which float like worms in th