These lines are:
<em>Parting is such sweet sorrow</em><em>That I shall say good night till it be morrow.
</em>Neither Romeo nor Juliet want this night to end because they don't want to leave each other's side. They want to stay together the entire night, but given that they are unable to, Juliet speaks those famous parting words, wishing to meet Romeo again in the morning.
In an attempt to keep her plants from freezing, she left the stove on to keep them warm.
Tim is a clever, hardworking, and introspective boy. He takes quiet, intelligent paths through trying situations, as opposed to his father and brother, who share a boldness and impetuousness.
I am assuming that you are asking about Mr. Frank. He finds the secret room when he returns at the end of the war.
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The term or name for word clues in a text that appear different because they are bolded, highlighted, italicized or written in a different font is typographical, which refers to the work of setting and arranging types and of printing from them; it pertains to the character and appearance of printed material.