Either their sentiment in favor of the Union was too strong, or they found nothing in the condition of affairs to encourage their Southern feelings.

A large Federal force was known to be advancing; Lee's army, in tatters, and almost without supplies, presented a very uninviting appearance to recruits, and few joined his standard, the population in general remaining hostile or neutral.
The condition of the army was indeed forlorn.

It was worn down by marching and fighting; the men had scarcely shoes upon their feet; and, above the tattered figures, flaunting their rags in the sunshine, were seen gaunt and begrimed faces, in which could be read little of the "romance of war." The army was in no condition to undertake an invasion; "lacking much of the material of war, feeble in transportation, poorly provided with clothing, and thousands of them destitute of shoes," is Lee's description of his troops.

Such was the condition of the better portion of the force; on the opposite side of the Potomac, scattered along the hills, could be seen a weary, ragged, hungry, and confused multitude, who had dragged along in rear of the rest, unable to keep up, and whose miserable appearance said little for the prospects of the army to which they belonged.
From these and other causes resulted the general apathy of the Marylanders, and Lee soon discovered that he must look solely to his own men for success in his future movements.

He faced that conviction courageously; and, without uttering a word of comment, or indulging in any species of crimination against the people of Maryland, resolutely commenced his movements looking to the capture of Harper's Ferry and the invasion of Pennsylvania.[1] [Footnote 1: The reader will perceive that the intent to _invade_ Pennsylvania is repeatedly attributed in these pages to General Lee.
His own expression is, "by _threatening_ Pennsylvania, to induce the enemy," etc.