of the Linnean Society, and died in London on the 1st of
February 1837.

DOOM (Old Eng. _dom_, a word common to Teut. languages for that which is
set up or ordered, from "do," in its original meaning of "place"; cf.
Gr. [Greek: themis], from stem of [Greek: tithemi]), originally a law or
enactment, the legal decision of a judge, and particularly an adverse
sentence on a criminal. The word is thus applicable to the adverse
decrees of fate, and particularly to the day of judgment. The verb
"deem," to deliver a judgment, and hence to give or hold an opinion, is
a derivative, and appears also in various old Teutonic forms. It is seen
in "deemster," the name of the two judges of the Isle of Man.

DOON DE MAYENCE, a hero of romance, who gives his name to the third
cycle of the Charlemagne romances, those dealing with the feudal
revolts. There is no real unity in the _geste_ of Doon de Mayence. The
rebellious barons are connected by the _trouveres_ with Doon by
imaginary genealogical ties, and all are represented as in opposition to
Charlemagne, though their adventures, in so far as they possess a
historical basis, must generally be referred to earlier or later periods
than the reign of the great emperor. The general insolence of their
attitude to the sovereign suggests that Charlemagne is here only a name
for his weaker successors. The tradition of a traitorous family of
Mayence, which was developed in Italy into a series of stories of
criminals, was however anterior to the Carolingian cycle, for an
interpolator in the chronicle of Fredegarius states (iv. 87) that the
army of Sigebert was betrayed from within its own ranks by men of
Mayence in a battle fought with Radulf on the banks of the Unstrut in
Thuringia. The chief heroes of the poems which make up the _geste_ of
Doon de Mayence are Ogier the Dane (q.v.), the four sons of Aymon (see
RENAUD), and HUON OF BORDEAUX (q.v.). It is probable that Doon himself
was one of the last personages to be clearly defined, and that the
_chanson de geste_ relating his exploits was drawn up partly with the
view of supplying a suitable ancestor for the other heroes. The latter
half of the poem, the story of Doon's wars in Saxony, is perhaps based
on historical events, but the earlier half, which is really a separate
romance dealing with his romantic childhood, is obviously pure fiction
and dates from the 13th century. Doon had twelve sons: Gaufrey de Dane
Marche (Ardennes?), t