With respect to the making of the contract, the evidence, when proper business inferences are drawn, leads to the following conclusions: - Rae in August 1925 had about 1,500 ewes for sale. He placed them in the hands of Kelly & McDonald as his agents to sell at 30s. a head. They were unable to effect a sale on those terms. J. E. Dowling & Co. were agents who had a prospective buyer of sheep, but they were cash agents and did not guarantee payment to vendors. Hamilton & Co. were agents who did guarantee vendors. A mutual arrangement was made between the three agents whereby each firm agreed among themselves to contribute operations in attempting to sell Rae's sheep. To the common agency enterprise Kelly & McDonald contributed the vendor, Dowling & Co. the purchaser, and Hamilton & Co. the promise to guarantee. That was the internal arrangement. But naturally to Rae the transaction was indivisible: he wanted to sell his sheep and, unless he was sure of his purchaser's solvency, to be guaranteed. The ordinary commission, that is, without guarantee, was 2½ per cent, but where in some way the vendor was secured by the agent's guarantee the commission was 5 per cent. Judging by what was said by Dowling & Co.'s representative to Rae, and by all that happened afterwards, the fact appears to be that Dowling & Co. were authorized by the associated firms of agents to communicate with Rae on behalf of all of them, to present to him the agency enterprise as a complete task, but, in order to satisfy him that it would be satisfactorily conducted, Dowling & Co. were to explain to him the several parts intended to be played. Those several parts were, in the end, indicated to Rae partly by words and partly by acts. The mention of Kelly & McDonald indicated that they were moving on Rae's instructions. Dowling & Co., he could see, were providing the purchasers and were to effect the actual sale if possible; and Hamilton & Co. were to do the financing part of the agency. He could also see that for this combined transaction the commission was to be, as regards Rae, an indivisible 5 per cent which, in accordance with the internal arrangements of the agents, would be by them apportioned, so as to give 1¼ per cent to Kelly & McDonald, 1¼ per cent to Dowling & Co., and 2½ per cent to Hamilton & Co. But above all the clear inference, as a business transaction, is that Dowling in making the agency contract was doing so as the representative and agent of all three; that is, all three promised for the due performance of so much of the agency duties as were still executory. Consequently all three were bound by its terms.