Walter,
In your message of 18 January 2008, you wrote "Some of the names mentioned in his [Wilbourn's] diary of 1865 are ... Jonathan Siron, ..."
I found an online excerpt from page 86 of your book in which Wilbourn's diary for about February 10, 1865, mentioned a "Signalman Siron at New Market".
I wonder if you could elaborate on the Sirons you mentioned. Here is what I have:
Jonathan Siron (b.1812) was the father of Joel Washington Siron (b.1844) who had been been wounded at Cold Harbor in June 1864 while serving in the Virginia 62nd Mounted Infantry. His military service during 1865 is unknown, but Oren F. Morton said on page 207 of his "History of Highland County, Virginia" (1912) that Joel Siron had served in the Signal Corps. I never could find another reference to that interesting tidbit until now.