court, which has not had an opportunity of seeing the witnesses, must accept his conclusions of fact because it cannot tell on what grounds he reached them and what impression the various witnesses made on him.’ 49. The following is the statement of the same principle in ‘The Supreme Court Practice’: ‘Great weight is due to the decision of a judge of first instance whenever, in a conflict of testimony, the demeanour and manner of witnesses who have been seen and heard by him are material elements in the consideration of the truthfulness of these statements. But the parties to the cause are nevertheless entitled as well on questions of fact as on questions of law to demand the decision of the court of appeal, and that court cannot excuse itself from the task of weighing conflicting evidence, and drawing its19 own conclusions, though it should always bear in mind that it has neither seen nor heard the witnesses and should make due allowance in this respect. (pp. 854-55) …Not to have