great was his popularity with the soldiers and
such the hatred felt for Nero, that he could easily have seized the
throne. Corbulo wrote an account of his Asiatic experiences, which is
lost.

See Tacitus, _Annals_, xii.-xv.; Dio Cassius lix. 15, lx. 30, lxii.
19-23, lxiii. 6, 17, lxvi. 3; H. Schiller, _Geschichte des romischen
Kaiserreichs unter der Regierung des Nero_ (1872); E. Egli, "Feldzuge
in Armenien von 41-63," in M. Budinger's _Untersuchungen zur romischen
Kaisergeschichte_, i. (1868); Mommsen, _Hist. of the Roman Provinces_,
ii. (1886); for the Armenian campaigns see B. W. Henderson in
_Classical Review_ (April, May, June, 1901); in general D. T.
Schoonover, _A Study of Cn. Domitius Corbulo_ (Chicago, 1909).

CORD (derived through the Fr. _corde_, from the Lat. _chorda_, Gr.
[Greek: chorde], the string of a musical instrument), a length of
twisted or woven strands, in thickness coming between a rope and a
string, a smaller kind of rope (q.v.). From the use of such a cord for
measuring, the word is applied to a quantity of cut wood, differing
according to locality. The variant "chord," which, in spelling, reverts
to the original Latin, is used in particular senses, as, in physiology,
for such cord-like structures as the vocal chords; in the case of the
"umbilical cord," the other spelling is usually retained. In mathematics
a "chord" is a straight line joining any two points on the same curve,
and, in music, the word is used of several musical notes sounded
simultaneously and in harmony (q.v.). In this last sense, "chord" is
properly a shortened form of "accord," agreement, from Late Lat.
_accordare_, and the spelling with _h_ is due to a confusion.

CORDAY D'ARMONT, MARIE ANNE CHARLOTTE (1768-1793), French revolutionary
heroine, the murderess of Marat, born at St Saturnin des Lignerets, near
Seez in Normandy, was descended from a noble but poor family, and
numbered among her ancestors the dramatist Corneille. Charlotte Corday
was educated in the convent of the Holy Trinity at Caen, and then sent
to live with an aunt. Here she saw hardly any one but her relative, and
passed her lonely hours in reading the works of the _philosophes_,
especially Voltaire and the Abbe Raynal. Another of her favourite
authors was Plutarch, from whose pages she doubtless imbibed the idea of
classic heroism and civic virtue which prompted the act that has made
her name famous. On the outbreak of the Revo