Toward the end of December, 1861, the prospects of the administration became very gloomy. McClellan had indeed organized a formidable army at Washington, but it had done nothing to efface the memory of the Bull Run defeat. On the contrary, a practical blockade of the Potomac by rebel batteries on the Virginia shore, and another small but irritating defeat at Ball's Bluff, greatly heightened public impatience. The necessary surrender of Mason and Slidell to England was exceedingly unpalatable. Government expenditures had risen to $2,000,000 a day, and a financial crisis was imminent. Buell would not move into East Tennessee, and Halleck seemed powerless in Missouri. Added to this, McClellan's illness completed a stagnation of military affairs both east and west. Congress was clamoring for results, and its joint Committee on the Conduct of the War was pushing a searching inquiry into the causes of previous defeats. To remove this inertia, President Lincoln directed specific questions to the Western commanders. "Are General Buell and yourself in concert?" he telegraphed Halleck on December 31. And next day he wrote: "I am very anxious that, in case of General Buell's moving toward Nashville, the enemy shall not be greatly reinforced, and I think there is danger he will be from Columbus. It seems to me that a real or feigned attack on Columbus from up-river at the same time would either prevent this, or compensate for it by throwing Columbus into our hands." Similar questions also went to Buell, and their replies showed that no concert, arrangement, or plans existed, and that Halleck was not ready to cooeperate. The correspondence started by the President's inquiry for the first time clearly brought out an estimate of the Confederate strength opposed to a southward movement in the West. Since the Confederate invasion of Kentucky on September 4, the rebels had so strongly fortified Columbus on the Mississippi River that it came to be called the "Gibraltar of the West," and now had a garrison of twenty thousand to hold it; while General Buckner was supposed to have a force of forty thousand at Bowling Green on the railroad between Louisville and Nashville. For more than a month Buell and Halleck had been aware that a joint river and land expedition southward up the Tennessee or the Cumberland River, which would outflank both positions and cause their evacuation, was practicable with but little opposition. Yet neither Buell nor Halleck had exchanged a word about it, or made the slightest preparation to begin it; each being busy in his own field, and with his own plans. Even now, when the President had started the subject, Halleck replied that it would be bad strategy for himself to move against Columbus, or Buell against Bowling Green; but he had nothing to say about a Tennessee River expedition, or cooeperation with Buell to effect it, except by indirectly complaining that to withdraw troops from Missouri would risk the loss of that State.