Van Eycks. This charge has, however, been proved to be an untruth;
Domenico died four years after Andrea. The latter is commonly called
"Andrea (or Andreino) degl' Impiccati" (of the Hanged Men); this was in
consequence of his being commissioned in 1435 to paint, in the Palazzo
del Podesta in Florence, the fallen leaders of the Peruzzi and
Albizzi--not (as currently said) the men of the Pazzi conspiracy, an
event which did not occur until 1478, long after this painter's death.
One of his principal works now extant (most of them have perished) is
the equestrian figure of Nicola di Tolentino, in the cathedral of
Florence.

CASTALIA, or FONS CASTALIUS, a celebrated fountain in Greece, now called
the Fountain of St John, which rises in a chasm of Mount Parnassus, in
the neighbourhood of Delphi. It was sacred to Apollo and the Muses, and
its water was used in the religious purifications of the "Pythian
Pilgrims." From its connexion with the Muses it is sometimes referred to
by late Greek writers (e.g. Lucian, _Jup. Trag._ 30) and Latin poets
(e.g. Ovid, _Am._ i. 15. 36) as a source of inspiration, and this has
passed into a commonplace of modern literature. According to some
authorities the nymph Castalia was the daughter of Achelous; according
to others the water of the spring was derived from the Boeotian
Cephissus.

CASTANETS (Fr. _castagnettes_, Ger. _Kastagnetten_, Span.
_castanuelas_), instruments of percussion, introduced through the Moors
by way of Spain into Europe from the East, used for marking the rhythm
in dancing. Castanets, always used in pairs, one in each hand, consist
of two pear or mussel-shaped bowls of hard wood, hinged together by a
silk cord, the loop being passed over the thumb and first finger. The
two halves are then struck against each other by the other fingers in
single, double or triple beats, giving out series of hollow clicks of
indefinite musical pitch. When intended for use in the orchestra the
pair of castanets is mounted one at each end of a wooden stick about 8
in. long, which facilitates the playing. Castanets are also sometimes
used in military bands and are then specially constructed. The two
halves are kept open by a slight spring fixed to a frame attached to the
hoop of a side drum, and the instrument is worked by the drummer with an
ordinary drum-stick. An instance of the use of castanets in opera occurs
in the Habanera in _Carmen_. A quaint description of _castinatts_