When the contractor appealed to the Chief Engineer, as he did on 12th September, to give the matter early attention, and to issue a certificate for payment of work done since 12th August, and forwarded to him the Resident Engineer's statement of the position, then clearly it was the duty of the Chief Engineer to consider the matter as the certifier under the contract. He performed that duty, and informed the contractor that he had examined it, and found "that to pay the amount" which the contractor claimed on last month's work "would cause the payment" to him "to exceed the amount stated in the contract, plus the extras, which I have approved the payment of." Perhaps I should add that, on the same day as the Chief Engineer wrote his letter, the Assistant Engineer prepared a memorandum for him, referring to the Resident Engineer's letter, which the contractor had already sent to the Chief Engineer, and to cl. 27 of the conditions enabling the Chief Engineer to rectify, if he thought proper, prior certificates I assume that the Chief Engineer received this memorandum before he replied to the contractor, but there is nothing objectionable in it. It states the case from the point of view of the officers of the Railway Department, as the contractor had stated his case. The Engineer was, no doubt, bound to act impartially between the parties, his duty was to give or receive "a certificate ... according to what he conceives to be the right and truth as to the work done" (McDonald v. Workington Corporation[55]). At this stage he was not bound to sit and hear evidence in a formal way, though he ought, of course, to hear what the parties had to say if either expressed a desire to be heard (see Hudson on Building Contracts, 4th ed., vol. i., p. 728). And his determination at this point as a certifier was, as I read the contract, subject to appeal under the arbitration clause. Each of the parties to the contract put his case in his own way to the Chief Engineer, and was seised of the substance of the other's contention. And, indeed, the contract (cl. 33) empowered the Chief Engineer to enter upon the matter without formal reference or notice to the parties. I have been at some pains, in an earlier part of this judgment, to show that the Chief Engineer had solid foundation for his determination, and that it was not an arbitrary, capricious or unreasonable decision, but was, as we now know the facts, a true and right one. If the Chief Engineer could never again approach this question with "the perfectly open judgment, the absence of all previously formed or pronounced views," - and I take leave to doubt whether this was impossible in the case of a skilled and honest man - then, as I have before pointed out, that was inevitable from the nature of the contract. When, again, the contractor wrote on 12th September giving particulars of his claim for a progress certificate for the month ending on that date, surely the Chief Engineer was bound, as a matter of courtesy and business, if not of obligation under the contract, to give some reply; and when, on the 17th, he replied that only £218 10s. was due under the contract, and that amounts allowed from time to time were only estimated progress payments, there was, to my mind, nothing in that act which showed that he was unfit to perform his functions under the contract, or that he had failed to exercise that independence and impartiality which were required of him under the contract. The interest of the public and of the Commissioner demanded, one must not forget, as much consideration as that of the contractor. The subsequent events arose, in truth, from the acts of the contractor, and his refusal to further correspond with the Chief Engineer. He appealed, as has been seen, to the Railways Commissioner, and demanded a new certifier "who would carry out his duties in a judicial manner." And, because the Commissioner investigated this and other complaints, and called upon the Chief Engineer, as his officer, for reports on his conduct as the certifier under the contract, the contractor now relies upon these acts as proof that the Commissioner and the Chief Engineer acted collusively, that the Chief Engineer committed himself irrevocably to his employer's cause, and so abandoned his position of independence under the contract, and became unfit to act further as a certifier or as an arbitrator pursuant to the contract. But the circumstances in which the communications between the Commissioner and the Chief Engineer arose completely destroy the sinister allegations of the contractor, and there is nothing in the correspondence itself which betrays any abandonment on the part of the Chief Engineer of an independent and impartial attitude, such as was required of him under the contract. The Commissioner was right in requiring the reports, and the reports were fairly given, and indicate no bias against nor annoyance with the contractor. Indeed, the Chief Engineer reported in a restrained manner, markedly different in tone from that adopted by the contractor and his solicitor in their communications to the Commissioner.