Statistics for occurrence #1 of “Corcoran” in chapter 6 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

...e night of May 23, 1861, three columns of Federal soldiers crossed the Potomac, one by the aqueduct, one by Long Bridge, and one by water to Alexandria. The smooth-bore guns in the armament of Fort Corcoran were two 8-inch howitzers en barbette. The rifled guns consisted of three 3-inch Parrotts en embrasure. The term en barbette refers to the placing of a gun so that the muzzle projected over a wall. ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Michael Corcoran 190 4 28 2 0 user votes
Corcoran 360 0 174 0 0 user votes
W. W. Corcoran 120 0 10 0 0 user votes
M. Corcoran 21 0 3 0 0 user votes
Thomas Corcoran 16 0 0 0 0 user votes
William Wilson Corcoran 16 0 0 0 0 user votes
Dennis Corcoran 12 0 0 0 0 user votes
Gen Corcoran 12 0 0 0 0 user votes
J. Corcoran 10 0 0 0 0 user votes
James Corcoran 8 0 0 0 0 user votes
John Corcoran 8 0 0 0 0 user votes
Thomas E. Corcoran 8 0 0 0 0 user votes
Arthur Corcoran 6 0 0 0 0 user votes
James A. Corcoran 6 0 0 0 0 user votes
Jeremiah J. Corcoran 6 0 0 0 0 user votes
John H. Corcoran 5 0 1 0 0 user votes
W. Corcoran 3 0 1 0 0 user votes
Charles Corcoran 2 0 0 0 0 user votes
Daniel Corcoran 2 0 0 0 0 user votes
Frank Corcoran 2 0 0 0 0 user votes
M. F. Corcoran 2 0 0 0 0 user votes
Mike Corcoran 2 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.