SOURCE: You can find Francis Barlow's illustrated edition of Aesop's fables (1687 edition) available online at Michigan State University. I've also transcribed the fables at the Aesopus wiki, with page images at Aesopica.net. This is fable 5 in Barlow. For parallel versions, see Perry 360.
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:
Asinō esculenta messōribus in agrō portantī occurrit herīlis Canis, cui dīxit, Tū panibus cibīsque onustus es, quōrum mox egō particeps erō, interim dum per viam incēdis, tū ipse rubōs comedis. Huic Asinus rēspondēbat, Frustula fortasse et offa ad tē pertinēbunt, vērum rubī quōs egō comedō sunt grātiōrēs mihi et magis meum palātum sapiunt, quam omnēs in macellō carnēs aut bellāria in pistōrum officīnis.
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):
Ásino esculénta messóribus in agro portánti occúrrit herílis Canis, cui dixit, Tu pánibus cibísque onústus es, quorum mox ego párticeps ero, ínterim dum per viam incédis, tu ipse rubos cómedis. Huic Ásinus respondébat, Frústula fortásse et offa ad te pertinébunt, verum rubi quos ego cómedo sunt gratióres mihi et magis meum palátum sápiunt, quam omnes in macéllo carnes aut bellária in pistórum officínis.
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:
Asino
esculenta messoribus in agro portanti
occurrit herilis Canis,
cui dixit,
Tu
panibus cibisque onustus es,
quorum
mox ego particeps ero,
interim
dum per viam incedis,
tu ipse rubos comedis.
Huic
Asinus respondebat,
Frustula fortasse et offa
ad te pertinebunt,
verum rubi
quos ego comedo
sunt gratiores mihi
et magis meum palatum sapiunt,
quam omnes in macello carnes
aut bellaria in pistorum officinis.
IMAGE. Here is Francis Barlow's illustration for the story: