When I taught a weekend mini-course on public speaking at Johns Hopkins University in the 1980s, I assigned his speeches because I considered them some of the most eloquent ever written.

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But the man he first gave it to, Henri-Germain Delauze, who owns a maritime engineering firm, has scoured three-quarters of Mr Bianco's course with sonar and mini-submarines without yet turning up a thing.

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Dr Griffin, therefore, has the difficult job of charting a course among these competing mini-visions.

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However, it was the iPad mini which was the main course, the only product that was really new - if you count becoming smaller as a real leap forward.

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And, of course, the iPad weighs very little, especially the new Mini, and is a good e-reader.

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