The final stanza of "A Poem for Mrs. Long, My Librarian" indicates that books gave the speaker comfort and hope during her childhood. Just before this stanza, the reader states that her everyday life is fine, but in this stanza, she informs the reader that books still provided an escape to somewhere more magical than her own world. In the final line, the speaker discusses how her librarian, and the books she shared, were a source of "Spring"(hope) for her.
They are called "Tercet".
