Source:
http://www.army.mil/cmh/Default.htmNote: This is not my ancestry. I have NO additional information. I am just passing along information that may be useful.
IRSCH, FRANCIS
Rank and organization: Captain, Company D, 45th New York Infantry. Place and date: At Gettysburg, Pa., 1 July 1863. Entered service at: New York, N.Y. Birth:------. Date of issue: 27 May 1892. Citation: Gallantry in flanking the enemy and capturing a number of prisoners and in holding a part of the town against heavy odds while the Army was rallying on Cemetery Hill.