neutri. The plural is used because the reference is to two parties, each
composed of several individuals. 'Neither' of two individuals would be
_neuter_.

17. volebant, dedit. Consider the tenses. Each army waited for some time
for the other to cross; finally Hercules gave the signal.

22. occiderint. The perfect subjunctive is sometimes used in result
clauses after a past tense in the principal clause. This is contrary to
the general principle of the sequence of tenses, which requires the
imperfect or pluperfect subjunctive after a past tense, the present or
perfect subjunctive after a present or future tense.

23. Viri. Compare this with _hominibus_, 12, 2.

24. praestabant. Compare the tense with praestiterunt, line 21.

27. neu. As _neque_ or _nec_ is used for 'and not,' so _neve_ or _neu_
for 'and that not' in an object-clause or a clause of purpose.

20. 1. quibus, 'and by these,' The relative is much used in Latin to
connect a new sentence with the one preceding. When so used, it is
generally best rendered by 'and' or 'but' and a demonstrative or personal
pronoun.

ita ... ut. See the note on 17, 9.

2. essent, most easily explained as the subjunctive of attraction. By
this is meant that the verb is attracted into the mood of the clause upon
which it depends.