You understand, of course, that the time which must elapse before you come into absolute possession of your estate is a limited one.

As by the terms of the will we are to hand over our trust when you have reached the age of twenty-one, there are only seven years to expire.

But till then, though I should gladly meet your wishes if I could, I must adhere to the duty which I have undertaken.

At the expiration of that period you will be quite free to divest yourself of your estate without protest or comment of any man.
Having now expressed as clearly as I can the limitations by which I am bound with regard to the corpus of your estate, let me say that in any other way which is in my power or discretion I shall be most happy to see your wishes carried out so far as rests with me.
Indeed, I shall undertake to use what influence I may possess with my co-trustees to induce them to take a similar view of your wishes.

In my own thinking you are quite free to use your own property in your own way.