The Valley of the Shadow: Two Communities in the American Civil War [Freely available electronic resource]
"The Valley Project details life in two American communities, one Northern and one Southern, from the time of John Brown's Raid through the era of Reconstruction. In this digital archive, you may explore thousands of original letters and diaries, newspapers and speeches, census and church records, left by men and women in Augusta County, Virginia, and Franklin County, Pennsylvania." To search just diaries, click on "Letters & Diaries" in the appropriate time period and then "Search the Letters & Diaries." You will then see an option to search only diaries.