Col. Mulligan assumed command of the whole by seniority of commission. He was an Irishman with all his race's pugnacity, and also its effervescence. He was born in Utica, N. Y., in 1830, had graduated from a Roman Catholic college, studied law, and edited the principal Roman Catholic paper in the West, "The Tablet."
Lexington, which is the County seat of Lafayette County, was a very important place in frontier times, and the center of the great hemp-growing region of Missouri. It is situated on the south bank of the Missouri River, about 300 miles by its course above St. Louis, and about 84 miles below Kansas City by water, or 42 miles by rail. It consisted of two towns, Old and New Lexington, about a mile apart, having altogether about 5,000 people. It had some manufactories and two or three colleges, one of which, the Masonic College, situated on high ground between Old and New Lexington, a half mile from the river, was taken by Col. Mulligan for his position, which he proceeded to fortify with high, substantial works to accommodate 10,000 men, inclosing about 15 acres on the summit of the bluffs. Between 2,000 and 3,000 horses and other animals of the trains were gathered inside this inclosure.
A week before Col. Mulligan's arrival, on Sept. 9, Gov. Jackson had briefly set up his Capital there, and held a session of that portion of the Legislature which adhered to him. The approach of Col. Pea-body caused a precipitate adjournment, and there was left behind $800,000 in coin, which was buried in the cellar of the college, with the great seal of the State of Missouri.
At dawn on Sept. 12, Gen. Price, riding with his advance, Rains's Division, struck the Union pickets stretching through the cornfields outside of Lexington, but though he brought up all his infantry within reach, and McDonald's, Guibor's, and Clark's batteries, his heads of columns were beaten back everywhere by the stubborn Union soldiers, who had been waiting three days for him, and he wisely decided to withdraw two or three miles and wait for the rest of his forces and ammunition wagons to come up.
Col. Mulligan telegraphed to Col. Jeff C. Davis, at Jefferson City—120 miles away—the fact of Price's advance and his need for help, and Davis sent the news to Fremont, who ordered forward three regiments and two batteries to Davis, and directed him to reinforce Mulligan, which he could do by rail and river. Fremont also sent orders to Pope and Sturgis to help Mulligan out, but there was not much urgency in the orders, and each of his subordinates seems to have taken his own time and way of obeying or not obeying.
Jeff C. Davis had at that time something over 5,000 men at Jefferson City, and subsequent reinforcements raised this number, it was claimed, to 11,000—certainly to 8,000. Davis afterward became a valuable division and corps commander, but he certainly did not show up well in this transaction. He, also, had too much of the "Regular" in him. He complained of a lack of wagons and harness, commissary supplies and ammunition, to enable him to make a forward movement. He had none of the spirit of Lyon and Price, to impress teams and supplies and make means to do what ought to be done.
It was harvest time in that fertile part of Missouri, and his army need not have suffered for food, wherever he went. But all that he did was to send forward a couple of regiments to occupy points and prevent the Secessionists from crossing the river at those places. They had all either crossed or found other unguarded places.
Pope showed similar incapacity. He had 5,000 men in easy reach of Lexington, but he was more engrossed in the Hannibal & St Joseph Railroad and in matters in Keokuk and Canton than in Lexington. He telegraphed to Gen. Fremont that he would move forward 4,000 men to Lexington, and actually did send forward Lieut.-Col. Scott with the 3d Iowa and Robt. F. Smith with the 16th 111., with instructions to form a junction at liberty, in Clay County, and then proceed to Lexington. Lieut-Col. Scott pushed on to the Blue Mills Landing on the Missouri River, where he came in contact with a large Secession force. Six regiments of the Missouri State Guard were there, making their way to Lexington.