Judging by the despatches of General Fremont, he seems to have felt no apprehension as to the fate of Mulligan, and made no serious effort to relieve him. The force at Jefferson City remained there. The troops at St. Louis were not moved. General Pope, who, under orders from General Fremont, had advanced from Hannibal to St. Joseph along the line of the railroad, driving off depredators, repairing the road, and stationing permanent guards, heard on September 16th, at Palmyra on his return, something of the condition of affairs at Lexington. He had sent his troops then in the western part of the State toward the Missouri River in pursuit of a depredating body of the enemy. He immediately despatched an order to these troops to hasten to Lexington upon completing their present business. They were not able, however, to arrive in time. Price, having organized his command into five divisions, each commanded by a general officer, did not push his siege vigorously till the 18th. On that day, a force proceeding through the city of Lexington and under cover of the river-bank, seized the ferry-boats, cut Mulligan off from his water-supply, and carried a mansion close to Mulligan's works and overlooking them. A sortie and a desperate struggle regained possession of the house. Another assault and another desperate struggle finally dispossessed the garrison of the house. Price closed in upon the beleaguered works and firing became continuous and uninterrupted. On the 20th, Price, having a footing on the plateau, carried up numbers of bales of hemp and used them as a movable entrenchment. By rolling these forward, he pushed his line close to Mulligan's works. The besieged were already suffering from want of water, and surrender could be no longer postponed.