Nevertheless, it was no small undertaking. The Vyrnwy had to be crossed at Llanymynech and the Severn at Pool Quay and again near Buttington. The rest of the line was comparatively free from serious engineering problems, but fresh Parliamentary powers had to be obtained to construct a branch from Llynclys to the Porthywaen lime quarries, and even a little addition of this sort involved endless correspondence over details and other wearing worries. Difficulties of another sort, more formidable, began to appear. The Earl of Powis, whose influence counted for so much, expressing regret for certain differences which had arisen in relation to the policy of the Board, wrote to Sir Watkin resigning his seat, adding the warning note, "I think you should for your own sake watch somewhat jealously the proceedings with regard to the contract." Sir Watkin hastened to assure his lordship of the "grief and astonishment" which his withdrawal had occasioned his colleagues and to deprecate divisions at critical hours. And it certainly was a critical hour. Money was urgently wanted, borrowing was barred until provisions of the Act were complied with, and though an attempt by Mr. Barlow to seek an injunction in Chancery failed after a hard struggle, the contract had to be dissolved in order to substitute an arrangement by which payment could be made by shares and debentures in lieu of cash. It was on this account that Messrs. Davidson and Oughterson, who had earlier succeeded Messrs. Thornton and McCormick, in turn gave place to the men who had already come to the rescue of the Newtown and Llanidloes undertaking.