“Now it is to be remembered that under the law as it stands the duty of the Commissioners [and from1 April 2009 the Tribunal] who hear the appeal is this: Parties are entitled to produce any lawful evidence, and if on appeal it appears to a majority of the Commissioners by examination of the Appellant on oath or affirmation, or by other lawful evidence, that the Appellant is over-charged by any assessment, the Commissioners shall abate or reduce the assessment accordingly; but otherwise every assessment or surcharge shall stand good. Hence it is quite plain that the Commissioners are to hold the assessment as standing goods unless the subject – the Appellant – establishes before the Commissioners, by evidence satisfactory to them, that the assessment ought to be reduced or set aside.”