Whatever hopes of permanency may have been cherished as to the new camp they were all destroyed before the day (14th) was done. There were inspections, always a Sunday feature, the distribution of cartridges, which had a businesslike aspect, and the dispatching of three companies to the picket line only to be recalled later with orders to pack up and be ready for a long march. In addition it was ordered that knapsacks be left behind, a fact that brought up visions of forced marching and a possible encounter. To the inexperienced soldiers separation from their knapsacks was a serious matter and each man debated Sept. 15, '62 with himself as to what he could best leave behind, the upshot of it all being that generally his blanket, tied in a roll and slung over the shoulder, was the one item deemed absolutely necessary. It was quite seven o'clock before the march began, the way being through camps and along the sides of forts until the Aqueduct Bridge, leading across the Potomac to Georgetown, was reached; the name of the bridge arising from the fact that the Chesapeake and Ohio Canal crossed here, terminating in Alexandria. Over the bridge and through Georgetown the pace was a brisk one until, after a march of possibly seven miles, a halt for the remainder of the night was ordered on a prominence back of the village of Tennallytown.

The 15th began with the soldiers at five o'clock and there was a march of fully two miles before the halt for breakfast. Apparently in the same line with our men were the Tenth Vermont and a Pennsylvania Battery and the news gradually spread through the ranks that the purpose of the speedy trip was to do picket duty along the Potomac River. To the undisciplined mind it did seem as though a less headlong pace might have been set for such an end, but it was not for the men to complain nor to reason why, but rather to plod along as rapidly as possible. Inasmuch as the heat was extreme, the roads dusty, many of the men, quite unused to the strain and wilting under the sun's rays, fell out. This day, too, the preparation of meals was entirely by the soldiers themselves, company cooks having done the work before. When a halt was ordered it was obeyed with the utmost alacrity, the men throwing themselves upon the ground with expressions of relief. When at last, after another advance, there came the orders to halt and prepare coffee, they were heard with gladness, the location being near an old mill on Waitt's Branch, this being an affluent of the Big Muddy Branch, but the night was not to be spent here, the officers deciding that it was not a defensible place, hence the march was continued in the most quiet manner possible, to the brow of a hill where camp was pitched for the night. In the light of subsequent knowledge that the enemy was many miles away, the extreme caution must have been the result of false information to those leading.

Another day, 16th, began early and the route was still up the Potomac, though the pace was not so rapid as that of yesterday. At noon dinner was eaten at Seneca Mills and then followed a stretch of about fifteen miles, leading up to Poolesville, a village by no means important in itself, yet it had been heard of frequently in Massachusetts since here, or in this locality, a year ago were encamped the Fifteenth, Nineteenth and Twentieth Regiments from the Bay State and through here had marched the Thirteenth. To Lieut. Colonel Peirson and Major Tremlett, the place must have seemed very familiar since both had been officers in the Twentieth. Not a few of the latest visitors thought that its size and appearance hardly comported with its notoriety. A sudden and violent rainstorm accompanied the entrance of the place where were found two cavalry companies on duty, who informed the inquirers that the Battle of Poolesville, shouted so loudly a few days before at Arlington, was really only a skirmish, in which the only casualty was the killing of a horse, the whole affair being one of many incidents, accompanying the movements of Stuart's Cavalry in the general advance of General Lee into Maryland. Notwithstanding the rain, weary men threw themselves upon the ground, glad to rest in any way anywhere; but long before morning the fierceness of the storm and the level character of the plain on which the men were lying, reducing the latter to something like a duck-pond, made the soldiers get up, build fires and try to dry themselves, but with indifferent success.

The day of Antietam's great battle, the 17th of September, found the regiment making coffee around fires that were larger than usual, owing to the moisture that pervaded everything, but wet or dry, there was to be no protracted Sept. 17, '62 halt here and the village, later to be quite familiar to the Thirty-ninth, was left behind as the regiment plodded along about three miles further. Turning off into some woods, camp was established, rations drawn and preparations were progressing for staying a while when orders came, directing five companies (B, C, D, G, and K) to go on picket at once. Marching about two miles further, the river was reached by the companies at Edward's Ferry. The latter is thirty-five miles from Washington and the section had been more or less mixed up with the war from the very start. Edward's Ferry was familiar on account of the Battle of Ball's Bluff, just across the Potomac, on the 21st day of October, one year before. Out in the river is Harrison's Island, a bit of land that had been seen in fancy by thousands of Northern people whose loved ones had died there. The road, traversed by the men, was the Leesburg pike, the ferry being one of the features of the way. While the country is attractive, with the historic river flowing through it, the soldiers were not there for historic studies. Posting one company at the Ferry as the extreme left, the men were strung along the river to Conrad's Ferry, five miles further up the stream. So on the banks of Old Potomac began the duties of soldiering in a region that had already echoed to battle's din. Parallel with the Potomac, sluggishly flows the Chesapeake and Ohio Canal and along its banks many of the picket groups were posted. Five miles to be under observation by about five hundred men or, as they were posted in groups of five, there were twenty posts to the mile and, if stationed at equal intervals, each set of sentinels was responsible for sixteen rods, but other circumstances than mere distance determined the placing of men on picket. Probably no more vigilant soldiers than these of the Thirty-ninth ever watched the river and opposite shore, for the novelty of the situation and the knowledge that the rebels were within shooting distance made the responsibility great. Besides, the rumbles from distant Antietam, throughout the 17th, were calculated to waken apprehensions in the minds of men who had no means of knowing what way the fight was going.