Although the great questions to which he devoted himself, while a representative in Congress, were those relating to the extension of slavery, yet he also found time to give to certain other subjects, working as usual with indomitable energy, and retaining his marvelous memory to the last. The idea of desponding or giving up, for any cause whatever, simply never entered his head. When his house, containing all the manuscript and papers of the nearly completed second volume of his "Thirty Years' View," was burned up, he did not delay a minute in recommencing his work, and the very next day spoke in Congress as usual.
His speeches were showing a steady improvement; they were not masterpieces, even at the last, but in every way, especially in style, they were infinitely superior to those that he had made on his first entrance into public life. Of course, a man with his intense pride in his country, and characterized by such a desire to see her become greater and more united in every way, would naturally support the proposal to build a Pacific Railroad, and accordingly he argued for it at great length and with force and justness, at the same time opposing the propositions to build northern and southern trans-continental roads as substitutes for the proposed central route. He showed the character of the land through which the road would run, and the easiness of the passes across the Rockies, and prophesied a rapid increase of states as one of the results attendant upon its building. At the end of his speech he made an elaborate comparison of the courses of trade and commerce at different periods of the world's history, and showed that, as we had reached the Pacific coast, we had finally taken a position where our trade with the Oriental kingdoms, backed up by our own enormous internal development, rendered us more than ever independent of Europe.
In another speech he discussed very intelligently, and with his usual complete command of the facts of the case, some of the contemporary Indian uprisings in the far West. He attacked our whole Indian policy, showing that the corruption of the Indian agents, coupled with astute aggressions, were the usual causes of our wars. Further, he criticised our regular troops as being unfit to cope with the savages, and advocated the formation of companies of frontier rangers, who should also be settlers, and should receive from the government a bounty in land as part reward for their service. Many of his remarks on our Indian policy apply quite as well now as they did then, and our regular soldiers are certainly not the proper opponents for the Indians; but Benton's military views were, as a rule, the reverse of sensible, and we cannot accept his denunciations of the army, and especially of West Point, as being worth serious consideration. His belief in the marvelous efficacy of a raw militia, especially as regards war with European powers, was childish, and much of his feeling against the regular army officer was dictated by jealousy. He was, by all the peculiarities of his habits and education, utterly unfitted for military command; and it would have been an evil day for his good fame if Polk had succeeded in having him made lieutenant-general of our forces in Mexico.