What two words indicate the presence of Homer?

So you are asking which two words in this poem show us
that Homer is present in the poem?  If so, I would say "deep-brow'd Homer" indicates
that Homer is present.  Other than that, there are many allusions to Homer and to the
style in which Homer (if he existed) wrote.

For example, we
see the presence of Homer when the poet speaks of "bards" who owe their allegiance to
"Apollo." This is an allusion to Homer since he was a bard who was Greek and who would
have possibly been loyal to Apollo.  We see the phrase "western islands," which
presumably refers to islands of the sort that Odysseus would have visited on his way
home to Ithaka.