"It is a matter of great difficulty to a Judge who disapproves of a decision to be quite sure that he is honestly distinguishing the case in which it was given from the case before him. Of course, the inclination of his mind is to find every distinction sufficient, and therefore he must be particularly on his guard to see that he does not unfairly distinguish with a view to getting rid of the original decision. I have tried in every instance before me to be thus on my guard, but whether I have succeeded or not will be for others to say."