124                  THE  WRITING  OF  NARRATIVE  LATIN

crops of his allies, to cut him off from supplies, the messenger
at once returned to Geneva. 14. Caesar's .army, after making
a forced march, carried the enemy's camp, pursued them a long
distance, and killed a great number of them. 15. The Gauls,
being induced by the talk of the traders to make war on the
Romans and not to stand firm^ in their allegiance, were
defeated with the loss of a large portion of their army.
16. Caesar, being informed of the revolt of the Gauls, set out
from Ocelum and led his army by forced marches among ^

the Remi.

«

I.  cedentes.    2. Use a cum clause.    3.  permaneo.   4.  in w. ace.
 

LESSON  XXIX
THE  CONDITIONAL  SENTENCE

155.   A complete conditional sentence consists of two clauses:
an if clause, called the protasis or conditional clause, and a con¬
clusion clause, called the apodosis or conclusional clause.

156.   The protasis is introduced in Latin by si, if.

a. A negative protasis is introduced by si non, if . . . not,
or by nisi, if . . . not, unless, except.

1.   Nisi negatives the entire protasis. Unless aid be sent me, I
cannot hold out, nisi subsidium mihi submittetur, sustinere non
potero.

2.   Si non negatives a single word. // you think it not fair, why do
you demand? si non aequum existimas, cur postulas ?

3.   Si non introduces a negative protasis when the apodosis is em¬
phasized by at, certe, tamen, at least, still, nevertheless, yet, or by any
combination of these words. // present danger is not to be feared,
starvation at least is, si non praesens periculum, at certe fames est
timenda.