"Who is the one who walks always beside you?"
The word "always" did not appear in the original draft: it was added by Pound. Eliot retained it because the use of the word highlights the hallucinatory nature of the elusive third figure, based on the fact that the speaker always sees the figure, no matter the time of day or location of his companion.
This website the work of Abigail L. Bunting
This website the work of Abigail L. Bunting