In 1886, York author, lawyer and judge John Gibson penned what at the time was the "official" history of York County, Pennsylvania. Much of his section on the Civil War was taken from research and notes by George Reeser Prowell, who would in 1907 publish his own, larger history of York County.
The York County Heritage Trust has hard copies of Gibson's and Prowell's works, and they are well worth perusing for the history buff interested in learning more about York County, Pennsylvania, during the Civil War. From an Internet genealogy dealer a few years ago, I picked up a fully searchable, downloadable copy of Gibson's history in CD format, and I have used it quite often as a reference to this area's local history. I have found Gibson and Prowell to be very useful, although they clearly have several errors when it comes to the Civil War information.
Here is the bulk of Gibson's information on York County in the Rebellion, which I have slightly edited for clarity and rearranged the order to make a little more sense (the original text is not well organized). I have also changed a couple of Gibson's titles and subtitles. I have also italicized the names of most York countians in case you spot an ancestor's name.
