Addison has justly observed that fables were the first kind of humour. As the days of Athenian civilization advanced, their light chaff was thought more of than their solid matter. Two hundred years of progress in man caused the animals to be truly considered "lower," natural distinctions were better appreciated, and there seemed to be something absurd in the idea of their thinking or talking. Hence AEsop's fables are spoken of by Aristophanes as something laughable, and the fabulist came to be regarded as a humorist. This feeling gained ground so much afterwards that Lucian makes AEsop act the part of a buffoon in "The Isles of the Blessed." Such views no doubt influenced the traditions with regard to the condition and characteristics of their composer. There was the more field for this, inasmuch as even the fables were only handed down orally. Some biographer, formerly supposed to have been Planudes the monk, seems to have fertilized with his own inventive genius many tales which had themselves no better foundation than the conjectures derived from the tone and nature of the fables. AEsop was represented as droll, as a sort of wit, and by a development of the connection in the mind between humour and the ludicrous, they gave him an infirm body, hesitating speech, and servile condition. Improving the story, they said his figure frightened the servants of the merchant who bought him. At the same time many clever tricks and speeches were attributed to him. What we really glean from such stories is, that animal fables soon came to be regarded as humorous. It is probable that some fabulist of the name of AEsop at one time existed, but we know nothing with certainty about his life, and many of the fables attributed to him were perhaps of older date.