"If, in this kind of action, it is plain that an action could have been brought, and if it had been brought then it must have succeeded, of course the answer is easy. The damaged plaintiff would then recover the full amount of the damages lost by the failure to bring the action originally. On the other hand, if it be made clear that the plaintiff never had a cause of action, that there was no case which the plaintiff could reasonably ever have formulated, then it is equally plain that the answer is she can get nothing save nominal damages for the solicitor's negligence. I would add, as was conceded by Mr Neil Lawson, that in such a case it is not enough for the plaintiff to say: 'Though I had no claim in law, still, I had a nuisance value which I could have so utilised as to extract something from the other side and they would have had to pay something to me in order to persuade me to go away.' But the present case falls into neither one nor the other of the categories which I have mentioned. There may be cases where it would be quite impossible to try 'the action within the action' as Mr O'Connor asks. It may be that for one reason or another the action for negligence is not brought till, say, 20 years after the event. In the process of time the material witnesses or many of them may have died or become quite out of reach for the purpose of being called to give evidence. In my judgment, what the court has to do (assuming that the plaintiff has established negligence) in such a case as the present is to determine what the plaintiff has by that negligence lost. The question is, has the plaintiff lost some right of value, same chose in action of reality and substance? In such a case, it may be that its value is not easy to determine, but it is the duty of the Court to determine that value as best it can. (Emphases added.)