SOURCE: You can find both the first and second "hecatomythia" of Abstemius in Nevelet's monumental Aesop published in 1610, available at GoogleBooks. You can find out more about Abstemius at the Aesopus wiki. This is fable 187 in Abstemius, and you can find parallels categorized as Perry 149.
READ OUT LOUD. Choose which marked text you prefer to practice with - macrons or accent marks - and read the text out loud until you feel comfortable and confident. Then, try reading the unmarked text at the bottom. It should be easy for you after practicing with the marked texts. :-)
MACRONS. Here is the text with macrons:
Lupus et vulpes inītā inter sē societāte, vēnātum profectī sunt, quī cum cervum, quem cēperant, dīvidere vellent, superveniēns leo tertiam praedae partem sibi, ut quādrupedum rēgī dēbērī dīcēbat. Lupus vērō negābat. Tunc excandescēns leo, iniectīs in lupum unguibus, tōtum eius caput pelle nūdātum, rubicundum reddidit, unde lupus vix vīvus ēvāsit. Conversus hinc in vulpem leo, tū vērō quid dīcis? Egō, inquit, mī domine rex, nōn tertiam modo partem, sed tōtum cervum tuum esse nōn infitior. Ecquis, inquit leo, tē ita sapienter docuit rēspondēre? Galērus, ait vulpes, ille ruber, quem sociō meō lupō imposuistī. Fābula indicat, melius esse partem interdum concēdere, quam tōtum āmittere.
ACCENT MARKS. Here is the text with ecclesiastical accents, plus some color-coding for the words of three or more syllables (blue: penultimate stress; red: antepenultimate stress):
Lupus et vulpes inita inter se societáte, venátum profécti sunt, qui cum cervum, quem céperant, divídere vellent, supervéniens leo tértiam praedae partem sibi, ut quadrúpedum regi debéri dicébat. Lupus vero negábat. Tunc excandéscens leo, iniéctis in lupum únguibus, totum eius caput pelle nudátum, rubicúndum réddidit, unde lupus vix vivus evásit. Convérsus hinc in vulpem leo, tu vero quid dicis? Ego, inquit, mi dómine rex, non tértiam modo partem, sed totum cervum tuum esse non infítior. Ecquis, inquit leo, te ita sapiénter dócuit respondére? Galérus, ait vulpes, ille ruber, quem sócio meo lupo imposuísti. Fábula índicat, mélius esse partem intérdum concédere, quam totum amíttere.
UNMARKED TEXT. Here is the unmarked text - after practicing with the marked text that you prefer, you should not have any trouble with the unmarked text:
Lupus et vulpes
inita inter se societate,
venatum profecti sunt,
qui
cum cervum, quem ceperant,
dividere vellent,
superveniens leo
tertiam praedae partem sibi,
ut quadrupedum regi
deberi dicebat.
Lupus vero negabat.
Tunc excandescens leo,
iniectis in lupum unguibus,
totum eius caput pelle nudatum,
rubicundum reddidit,
unde lupus vix vivus evasit.
Conversus hinc in vulpem
leo,
tu vero quid dicis?
Ego, inquit, mi domine rex,
non tertiam modo partem,
sed totum cervum
tuum esse non infitior.
Ecquis, inquit leo,
te ita sapienter docuit respondere?
Galerus, ait vulpes, ille ruber,
quem socio meo lupo imposuisti.
Fabula indicat,
melius esse
partem interdum concedere,
quam totum amittere.
IMAGE. Here is an illustration for the story (image source) showing the lion having a discussion with the fox: