“I find it difficult to answer this question as put, because it appears to me to proceed on the erroneous assumption that the truster has directed the income of the trust-estate to be paid to the liferent beneficiaries in the proportion of their respective interests, and it is only in view of that, as I think erroneous assumption, that we are asked or that it is necessary to distinguish between the income and capital of the trust estate, or to determine whether the profits in question are to be treated in whole or in part as income or capital.