fourth region to the three belonging to the Palatine
city, viz. the Suburan, Palatine, and suburban (-Esquiliae-). In
the case of the original --synoikismos-- the annexed community was
recognized after the union as at least a tribe (part) of the new
burgess-body, and thus had in some sense a continued political
existence; but this course was not followed in the case of the
Hill-Romans or in any of the later processes of annexation. After
the union the Roman community continued to be divided as formerly
into three tribes, each containing ten wardships (-curiae-); and the
Hill-Romans--whether they were or were not previously distributed
into tribes of their own--must have been inserted into the existing
tribes and wardships. This insertion was probably so arranged that,
while each tribe and wardship received its assigned proportion of
the new burgesses, the new burgesses in these divisions were not
amalgamated completely with the old; the tribes henceforth presented
two ranks: the Tities, Ramnes, and Luceres being respectively
subdivided into first and second (-priores-, -posteriores-). With
this division was connected in all probability that arrangement
of the organic institutions of the community in pairs, which meets
us everywhere. The three pairs of Sacred Virgins are expressly
described as representatives of the three tribes with their first
and second ranks; and it may be conjectured that the pair of Lares
worshipped in each street had a similar origin. This arrangement
is especially apparent in the army: after the union each half-tribe
of the tripartite community furnished a hundred horsemen, and the
Roman burgess cavalry was thus raised to six "hundreds," and the
number of its captains probably from three to six. There is no
tradition of any corresponding increase to the infantry; but to
this origin we may refer the subsequent custom of calling out the
legions regularly two by two, and this doubling of the levy probably
led to the rule of having not three, as was perhaps originally
the case, but six leaders-of-division to command the legion. It
is certain that no corresponding increase of seats in the senate
took place: on the contrary, the primitive number of three hundred
senators remained the normal number down to the seventh century;
with which it is quite compatible that a number of the more prominent
men of the newly annexed community may have been received into the
senate of the Palatine city. The
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