Final answer:
In 'Sailing to Byzantium,' the speaker represents himself as 'an aged man,' reflecting his contemplation on aging and desire for immortality.
Step-by-step explanation:
In the poem Sailing to Byzantium, the speaker represents himself with the phrase "an aged man". This phrase highlights the speaker's sense of aging and his desire for transcendence and spiritual rebirth, which are overarching themes of the poem. The other options provided, such as "singing-master", "fish, flesh, or fowl", and "the artifice of eternity", represent different concepts within the text that do not directly pertain to the speaker's self-representation.