His _Gesammelte Werke_ appeared in 6 vols. (1812-1814); he is the
subject of an excellent monograph by F. Laban (1879). See also A.
Hauffen, _Das Drama der klassischen Periode_, ii. 2 (1891), where a
reprint of _Regulus_ will be found. M. von Collin's _Dramatische
Dichtungen_ were published in 4 vols. (1815-1817); his _Nachgelassene
Schriften_, edited by J. von Hammer, in 2 vols. (1827). A study of his
life and work by J. Wihan will be found in _Euphorion_,
Erganzungsheft, v. (1901).

COLLIN D'HARLEVILLE, JEAN FRANCOIS (1755-1806), French dramatist, was
born at Mevoisins, near Maintenon (Eure-et-Loire), on the 30th of May
1755. His first dramatic success was _L'Inconstant_, a comedy accepted
by the Comedie Francaise in 1780, but not produced there until six years
later, though it was played elsewhere in 1784. This was followed by
_L'Optimiste, ou l'homme toujours content_ (1788), and _Chateaux en
Espagne_ (1789). His best play, _Le Vieux Celibataire_, appeared in
1793. Among his other plays are--the one-act comedy _Monsieur de Crac
dans son petit castel_ (1791), _Les Artistes_ (1796), _Les Moeurs du
jour_ (1800) and _Malice pour malice_ (1803). Collin was one of the
original members of the Institute of France, and died in Paris on the
24th of February 1806.

The 1822 edition of his _Theatre et poesies fugitives_ contains a
notice by his friend the dramatist Andrieux. His _Theatre_ was also
edited by L. Moland in 1876; and by Edouard Thierry in 1882.

COLLING, ROBERT (1749-1820), and CHARLES (1751-1836), English stock
breeders, famous for their improvement of the Shorthorn breed of cattle,
were the sons of Charles Colling, a farmer of Ketton near Darlington.
Their lives are closely connected with the history of the Shorthorn
breed. Of the two brothers, Charles is probably the better known, and it
was his visit to the farm of Robert Bakewell at Dishley that first led
the brothers to realize the possibilities of scientific cattle breeding.
Charles succeeded to his father's farm at Ketton. Robert, after being
first apprenticed to a grocer in Shields, took a farm at Barmpton. An
animal which he bought at Charles's advice for L8 and afterwards sold to
his brother, became known as the celebrated "Hubback," a bull which
formed the basis of both the Ketton and Barmpton herds. The two brothers
pursued the same system of "in and in" breeding which they had learned
from Bakewell, and both the