The tone of the sentences are;
A literary tone is the mood being conveyed by the author through the manner he writes a text. This can also affect the feelings of the reader. The first sentence conveys the tone of someone in deep thoughts. This is deduced from the phrase, "gazed longingly".
The second sentence conveys an adventurous account. There is a certain fear that is felt here.
The last sentence demonstrates a happy tone as the characters expect the arrival of someone they know.
In conclusion thoughtful, foreboding and happy are the tones conveyed in the sentences respectively.
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