Statistics for occurrence #1 of “Merrimac” in article 20 of The Daily Dispatch: March 18, 1862., [Electronic resource]:

...lf ports, an iron-plated ship, of about 250 feet in length and 50 feet beam, which will be supplied with a number of engines and boilers; and when she ready it is supposed she will be quite equal to Merrimac No. 1.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Merrimac 875 2 1 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.