OK, I get that you are interested in naught but military matters of a certain time period concerning the various Alabama cavalry units, including the 51st Alabama, listed in your query. However, I hope you don't mind if I use this oppurtunity to post the following 51st Alabama Cavalry AKA 51st Alabama Partisan Rangers political material on this valuable, searchable board so others can find it. Thank you. (And I promise not to post any more on your thread.)

These two items relate the 51st to the famous/infamous Clement L. Vallandigham affair:
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The Spirit of Democracy (Woodsfield, OH) 03 Jun '63

http://chroniclingamerica.loc.gov/lccn/sn85038115/1863-06-03/ed-1/seq-2/#date1=1860&index=0&rows=20&words=51+Alabama+st&searchType=basic&sequence=0&state=&date2=1866&proxtext=%2251st+Alabama%22&y=6&x=20&dateFilterType=yearRange&page=1
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Astabula Weekly Telegram (Astabula, OH) 27 Aug '64

http://chroniclingamerica.loc.gov/lccn/sn83035216/1864-08-27/ed-1/seq-3/#date1=1863&index=2&rows=20&words=51+Ala+st&searchType=basic&sequence=0&state=&date2=1864&proxtext=%2251st+Ala%22+&y=8&x=14&dateFilterType=yearRange&page=1