I have always been a big fan of the pension payment cards from the National Archives. More specifically, these cards are the Organization Index to Pension Files of Veterans Who Served Between 1861 and 1900 (NARA T289.).
This card is the image from Footnote.com which has digitized the microfilm and indexed it.
We'll be discussing Alfred Butler in an upcoming issue of Casefile Clues. I think he is a possible son of the Benjamin Butler who in 1870 is in Davis County, Iowa, and later in Vernon County, Missouri. I'm not yet entirely certain.
If you don't have access to Footnote.com, the cards are on Archive.org. There they are a little tricky to get to at first--I blogged a while back about searching them on Archive.org. They are not indexed on Archive.org and you MUST know the state and the unit to use Archive.org's digital images. Footnote.com's images are indexed.
