He entreated her, for her father’s sake, never to seek to know whether her father had become oblivious of the existence of the paper, or had had it recalled to him (for the moment, or for good), by the story of the Tower, on that old Sunday under the dear old plane-tree in the garden.
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She is oblivious to the dangers.
She’s a happy girl—oblivious to most of the unhappiness around her.