"The jurisdiction of the Court to deal with such a claim appears from s 3 of the Act. It depends upon a finding by the Court that the testator: 'disposes of or has disposed of his property either wholly or partly by will in such a manner that the widow, husband, or children of such person, or any or all of them, are left without adequate provision for their proper maintenance, education, or advancement in life as the case may be'. Given such a finding, then, 'the court may at its discretion, and taking into consideration all the circumstances of the case, on application by or on behalf of such wife, husband, or children, or any of them, order that such provision for such maintenance, education, and advancement as the court thinks fit shall be made out of the estate of the testator for such wife, husband, or children, or any or all of them'."