In the fall of 1836, George Buchanan failed. The steamboat which he had built had just received its engine, and the _George Buchanan_ had made one trip to the Chenaux. The whole estate and business was transferred to Messrs. Simpson, Gould & Mettleberger. Mr. Buchanan went to his property on Victoria Island, at the Chats, where he had constructed a slide for the passing of timber, and which proved a lucrative speculation. The old company carried on the business at first briskly, but gradually declined in their operations till 1837 they ceased doing anything in the lumber line. They could get no logs from McNab without paying too dearly for the privilege. Mr. Rogerson, (brother-in-law of Mr. William Fraser, afterwards the esteemed Treasurer of the County of Lanark) still remained at Arnprior collecting the debts due to the Buchanan estate, and winding up the business. This was the state of affairs at Arnprior at the close of 1837. Towards the end of the year the commissioners gave out the contract of constructing the bridge at Johnson's Rock (Burnstown), to Mr. Duncan McNab (Auchessan), a lumberer, for L200. Mr. McNab set to work with skill and energy. He took into partnership Mr. Duncan Carmichael, and before the first of January, 1838, the new bridge--the long-talked of and disputed structure--was at length completed. This was now the only bridge on the Madawaska: that at Arnprior had been swept away by the spring freshet, and was not rebuilt till many years afterwards, when the Board of Works of the Province erected the White Bridge at Arnprior, further up the stream.