All that I was certain of was that my own department was seriously threatened.
July fifth, information was brought to my headquarters in Baltimore that a column of rebel cavalry — the same that had been raiding in the border counties of Pennsylvania--was in the Middletown Valley, moving eastwardly.
Taking this report as true, the enemy had turned his back upon the department of Major-General Couch, and reduced his probable objectives to Washington, Baltimore, or Maryland Heights.
In tMajor-General Sigel reached me, stating that the enemy had that morning retired from before Maryland Heights, and was marching with his main body up the Middletown Valley toward Boonesboro.
The question then was — were the rebels marching for Pennsylvania, or coming eastward by the Jefferson or Middletown pikes?
I concluded to await events in Frederick City, satisfied they would not be long delayed.
As Johnson still held the mountain pass to Middletown, the day (eighth) was spent in trying