Statistics for occurrence #1 of “Matamoras” in article 1 of The Daily Dispatch: September 5, 1861., [Electronic resource]:

...lications for clearances to Matamoras, Mexico, made at the custom-house for three years past have been within a week; and, also, that the convenient town of Brownsville, Texas, a little distance from Matamoras , on the other side of the Rio Grande, is quite as good a port as Matamoras, with the known advantage of being near the Gulf, and the probable one of being the port for which the shipments are intende...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Matamoras (Indiana, United States) 379 12 1 0 0 user votes
Matamoras (Pennsylvania, United States) 327 0 1 0 0 user votes
Matamoras (Ohio, United States) 178 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.