e when my house burned up on the Palatine?_

credo tum cum Sicilia florebat opibus et copiis magna artificia fuisse
in ea insula, _I believe that at the time when Sicily was powerful in
riches and resources there were great crafts in that island_;

eo tempore paruit cum parere necesse erat, _he obeyed at the time when
it was necessary to obey_;

illo die, cum est lata lex de me, _on that day when the law concerning
me was passed_.

SUBJUNCTIVE.

Lysander cum vellet Lycurgi leges commutare, prohibitus est, _when
Lysander desired to change the laws of Lycurgus, he was prevented_;

Pythagoras cum in geometria quiddam novi invenisset, Musis bovem
immolasse dicitur, _when Pythagoras had discovered something new in
geometry, he is said to have sacrificed an ox to the Muses_.

a. Note that the Indicative is much less frequent in such clauses than
the Subjunctive, and is regularly confined to those cases where the main
clause has tum, eo die, eo anno, eo tempore or some similar correlative
of the cum. Sometimes it depends entirely upon the point of view of the
writer whether he shall employ the Indicative or Subjunctive.

2. Cum Inversum. When the logical order of the clauses is inverted, we find
cum with the Perfect Indicative or Historical Present, in the sense of
_when_, _when suddenly_. The main clause in such cases often has jam, vix,
aegre, nondum; as,--

jam Galli ex oppido fugere apparabant, cum matres familiae repente
procurrerunt, _the Gauls were already preparing to flee, when suddenly
the matrons rushed forth_ (logically, _the matrons rushed forth as the
Gauls were preparing to flee_);

Treviri Labienum adoriri parabant, cum duas legiones venisse
cognoscunt, _the Treviri were preparing to attack, when (suddenly) they
learned that two legions had arrived_.

3. To denote a _recurring action_ in the past, cum is followed by the
Indicative, particularly of the Pluperfect (compare Sec. 287, 2; 302, 3);
as,--

cum ad aliquod oppidum venerat, eadem lectica ad cubiculum deferebatur,
_whenever he had arrived at some town, he was (always) carried in the
same litter to his room_;

cum equitatus noster se in agros ejecerat, essedarios ex silvis
emittebat, _whenever our cavalry had advanced into the fields, he would
send his charioteers out from the woods_.

a. Sometimes the Imperfect or Pluperfect Su