This is a detective story on how I found a new Civil War battle that is not listed in Frederick dyers compendium of the war of the rebellion

I was reading Robert H Moore 2nd's book on graham's Petersburg battery and I found a reference to a fight the battery was in on May 31, 1864 at the Gatlin farm

I checked the volume 10 of the official records of the Union and Confederate neighbors. On page 109 I found a reference to the fight.
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http://ebooks.library.cornell.edu/cgi/t/text/pageviewer-idx?c=moawar;cc=moawar;q1=May%2031;rgn=full%20text;idno=ofre0010;didno=ofre0010;view=image;seq=0139

Two union war ships were engaged in a battle against four pieces of confederate artillery at 4 mile creek also known as Gillian bar. This apparently refers to a sandbar.

I believe the four pieces of artillery Were graham's Petersburg battery

Bryce