whether, on the contrary, it embraced the share dealt with by the void limitation. The operation of the settlement is, of course,
MACPHERSON prior to and, in respect of the property it includes, paramount over
the will; the question ought, therefore, first to be considered in relation to the trusts of the settlement. By that instrument the trust premises are limited in the first place upon a void trust to apply the income for the maintenance, support and advancement of certain persons, "and subject thereto as to one half of the trust premises upon trust for" the grandchildren of a living person who shall attain twenty-one (and SO void) and upon trust as to the other half upon a valid trust for a class "and subject as aforesaid upon trust as to the whole of the trust premises for the children" of a named person "who shall attain the age of twenty-one years in fee simple in equal shares." The question concerns this last limitation.
In selecting a class of objects defined as the children of a living person who shall attain twenty-one, the final limitation or trust does not, of course, offend the rule against perpetuities. So far, therefore, as its validity depends upon the ascertainment of the persons who fall within the class and are to take under it, the last trust is open to no objection. But it is an ulterior limitation follow- ing limitations some of which are void. The two preceding trusts of corpus, each of a half share, would between them dispose of the entire trust premises if they were both valid and both took effect as vested interests. Thus, except as the result of the invalidity of a preceding disposition, nothing could pass under the ultimate limitation of the trust premises, unless one or other of the two classes to whom the half shares of corpus were respectively given failed for want of objects filling the description defining the class. This means that in the case of each half share it might be uncertain, until all possibility had ceased of the description being filled by anyone, whether the half share would pass under the ultimate trust. Since, in the case of the half share the trusts of which have been held invalid, the contingency which the clause specifies, viz., grand- children of a living person attaining twenty-one, might remain uncertain beyond the period of limitation allowed by law, it would follow, if the provision took effect according to its meaning, that the question whether the half share would pass under the ultimate