Where the will shows an intention that the second bequest shall take effect only in the event of the first bequest failing in a particular manner, the second bequest shall not take effect, unless the prior bequest fails in that particular manner.

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Illustration

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A makes a bequest to his wife, but in case she should die in his lifetime, bequeaths to B that which he had bequeathed to her. A and his wife perish together, under circumstances which make it impossible to prove that she died before him, the bequest to B does not take effect.

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