29 The plaintiff next submitted that if a proprietary interest in land would support a caveat, then, because it was the only holder of the 100 units in the Lakewood Trust, only the plaintiff, and not the defendant, had a proprietary interest in the South Land. The plaintiff submitted that the defendant only had a proprietary interest in the units in the Binningup Trust, and that this did not give the defendant any interest in the South Land which would support the caveat. In view of my conclusion that there was no trust in the so-called Lakewood Trust, it is strictly unnecessary to consider this submission. However, as the matter was argued, I will briefly express my views on it. What I say will be based on an assumption (contrary to my finding above) that there are two trusts. This argument depends very much upon treating the units in a unit trust as though they were separate property and as though they were choses in action, like shares. There is no doubt, as the authors in Jacobs' Law of Trusts in Australia, 6th Ed, at [315] say, that: "From an investor's point of view, for commercial purposes, owning units in a unit trust is the same as owning shares in a company". As the authors note, however, legally this is not so. In Charles v Federal Commissioner of Taxation (supra) at 609, it was stated: